using System;

using System.Text.RegularExpressions;

​

public class Example

{

    public static void Main()

    {

        string patternMatch = @"\{\\""minute\\"":+[0-9]*\}";

        string patternSub = @"[^0-9]*";

        string str = @"{\""structure\"":{\""element_obj\"":\""element_wrapper\"",\""element_data\"":{\""custom_class\"":\""other-wrapper\""},\""child\"":[{\""element_obj\"":\""container_full\"",\""element_data\"":\""KugCM7OA3K\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""container_block\"",\""element_data\"":\""YA04lxZJ9t\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_breadcrumb\"",\""element_data\"":\""a10EbS1GUh\""},{\""element_obj\"":\""container10_2\"",\""element_data\"":\""o2oDATVmkW\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_heading\"",\""element_data\"":\""9qwsQ0JSes\""}]},{\""child\"":[{\""element_obj\"":\""element_bookmark\"",\""element_data\"":\""cwFe2PBdVN\""}]}]},{\""element_obj\"":\""element_author\"",\""element_data\"":\""G8fXQ5b0TC\""},{\""element_obj\"":\""container1_1_1\"",\""element_data\"":\""4ys40Do73J\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_read_time\"",\""element_data\"":\""5Dd1Z34t0b\""},{\""element_obj\"":\""element_read_time\"",\""element_data\"":\""ToH0uZIALy\""}]},{\""child\"":[{\""element_obj\"":\""element_date_and_view\"",\""element_data\"":\""Yml8Slfv0E\""}]},{\""child\"":[{\""element_obj\"":\""element_date_and_view\"",\""element_data\"":\""GKa07uE0Ex\""}]}]}]}]}]}]},{\""element_obj\"":\""container_block\"",\""element_data\"":\""K2QHhHnlun\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""container1_8_3\"",\""element_data\"":\""Yc75MyR6f1\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_social_share\"",\""element_data\"":\""SB9emtBM3e\""}]},{\""child\"":[{\""element_obj\"":\""element_image\"",\""element_data\"":\""PgI7s3Ch3v\""},{\""element_obj\"":\""element_spacer\"",\""element_data\"":\""7TFDZITfd9\""},{\""element_obj\"":\""element_content_highlight\"",\""element_data\"":\""UfU5PjCCnC\""},{\""element_obj\"":\""element_spacer\"",\""element_data\"":\""pvDzG5dbCR\""},{\""element_obj\"":\""element_text_editor\"",\""element_data\"":\""d18oDYEtsi\""},{\""element_obj\"":\""element_heading\"",\""element_data\"":\""9OYxXgE2CA\""},{\""element_obj\"":\""element_image\"",\""element_data\"":\""39tQ0sF9jo\""},{\""element_obj\"":\""element_spacer\"",\""element_data\"":\""5Ms2Ow8VzG\""},{\""element_obj\"":\""element_text_editor\"",\""element_data\"":\""xO3wOTsqg0\""},{\""element_obj\"":\""element_heading\"",\""element_data\"":\""oK6L4LWWtt\""},{\""element_obj\"":\""element_text_editor\"",\""element_data\"":\""KtuLewFCJY\""},{\""element_obj\"":\""element_heading\"",\""element_data\"":\""zhyBppQoze\""},{\""element_obj\"":\""element_text_editor\"",\""element_data\"":\""ZO8KcYDvRq\""},{\""element_obj\"":\""element_image\"",\""element_data\"":\""meh9Icquqk\""},{\""element_obj\"":\""element_text_editor\"",\""element_data\"":\""ZSxxfrXjvX\""},{\""element_obj\"":\""element_spacer\"",\""element_data\"":\""jEZDKUkn7f\""},{\""element_obj\"":\""element_keyword\"",\""element_data\"":\""icNppGZi9m\""}]},{\""child\"":[{\""element_obj\"":\""container_full\"",\""element_data\"":\""lvClZPhFt9\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_banner\"",\""element_data\"":\""ZbsgnAg3Gb\""},{\""element_obj\"":\""element_elearning\"",\""element_data\"":\""4sUdmAK7QG\""},{\""element_obj\"":\""element_event\"",\""element_data\"":\""q27uX0nXnB\""},{\""element_obj\"":\""element_recommended_follow_group\"",\""element_data\"":\""5U52Wfgjlq\""}]}]}]}]},{\""element_obj\"":\""element_related_articles\"",\""element_data\"":\""pkozHtkSBl\""},{\""element_obj\"":\""element_content_recommendations\"",\""element_data\"":\""FyDNpsjB5x\""},{\""element_obj\"":\""container_full\"",\""element_data\"":\""Z1TW7sY7yW\"",\""container\"":[{\""child\"":[{\""element_obj\"":\""element_banner\"",\""element_data\"":\""aEgwrqI9IH\""},{\""element_obj\"":\""element_elearning\"",\""element_data\"":\""bRoFU6rarp\""},{\""element_obj\"":\""element_event\"",\""element_data\"":\""3DNleDHMss\""},{\""element_obj\"":\""element_recommended_follow_group\"",\""element_data\"":\""EljeensukB\""}]}]}]}]}]},\""resources\"":[{\""key\"":\""KugCM7OA3K\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""content-header\""},\""element_name\"":\""container_full\""},{\""key\"":\""YA04lxZJ9t\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""container_block\""},{\""key\"":\""a10EbS1GUh\"",\""name\"":\""\"",\""data\"":{\""align\"":\""left\""},\""element_style\"":{},\""element_name\"":\""element_breadcrumb\""},{\""key\"":\""o2oDATVmkW\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""content-title\""},\""element_name\"":\""container10_2\""},{\""key\"":\""9qwsQ0JSes\"",\""name\"":\""\"",\""data\"":{\""title\"":\""Article title\"",\""link_external\"":0,\""link\"":\""\"",\""text_align\"":\""left\"",\""tag\"":\""h1\""},\""element_style\"":{},\""element_name\"":\""element_heading\""},{\""key\"":\""cwFe2PBdVN\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_bookmark\""},{\""key\"":\""G8fXQ5b0TC\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_author\""},{\""key\"":\""4ys40Do73J\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""info-statistic\""},\""element_name\"":\""container1_1_1\""},{\""key\"":\""5Dd1Z34t0b\"",\""name\"":\""\"",\""data\"":{\""minute\"":3},\""element_style\"":{},\""element_name\"":\""element_read_time\""},{\""key\"":\""ToH0uZIALy\"",\""name\"":\""\"",\""data\"":{\""minute\"":12},\""element_style\"":{},\""element_name\"":\""element_read_time\""},{\""key\"":\""Yml8Slfv0E\"",\""name\"":\""\"",\""data\"":{\""format\"":\""Date Only\""},\""element_style\"":{},\""element_name\"":\""element_date_and_view\""},{\""key\"":\""GKa07uE0Ex\"",\""name\"":\""\"",\""data\"":{\""format\"":\""View Only\""},\""element_style\"":{},\""element_name\"":\""element_date_and_view\""},{\""key\"":\""K2QHhHnlun\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""container_block\""},{\""key\"":\""Yc75MyR6f1\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""container1_8_3\""},{\""key\"":\""SB9emtBM3e\"",\""name\"":\""\"",\""data\"":{\""is_social\"":true,\""is_link\"":true,\""is_share\"":true,\""align\"":\""left\"",\""social\"":[\""FACEBOOK\"",\""TWITTER\"",\""LINE\""]},\""element_style\"":{},\""element_name\"":\""element_social_share\""},{\""key\"":\""PgI7s3Ch3v\"",\""name\"":\""\"",\""data\"":{\""media_uuid\"":\""e502306f-b0fc-4a3b-9c7d-3e8e7d4743e5\"",\""url\"":\""https://storage.googleapis.com/sg-dev-set-mis-cms/WEB_SETINVESTOR/Images/2020/Oct/ebook1_lightgrey%402x-23131012.jpg?ver=20201103064408\"",\""link\"":\""\"",\""link_external\"":0,\""image_zoom\"":false},\""element_style\"":{},\""element_name\"":\""element_image\""},{\""key\"":\""7TFDZITfd9\"",\""name\"":\""\"",\""data\"":{\""height\"":\""30px\""},\""element_style\"":{},\""element_name\"":\""element_spacer\""},{\""key\"":\""UfU5PjCCnC\"",\""name\"":\""\"",\""data\"":{\""title\"":\""In Focus\"",\""items\"":[{\""active\"":true,\""html\"":\""I am text block. Click edit button to change this text. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.\""}]},\""element_style\"":{},\""element_name\"":\""element_content_highlight\""},{\""key\"":\""pvDzG5dbCR\"",\""name\"":\""\"",\""data\"":{\""height\"":\""30px\""},\""element_style\"":{},\""element_name\"":\""element_spacer\""},{\""key\"":\""d18oDYEtsi\"",\""name\"":\""\"",\""data\"":{\""html\"":\""%3Cp%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20%3Ca%20href=%22#%22%3ELorem%3C/a%3E%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/p%3E\""},\""element_style\"":{},\""element_name\"":\""element_text_editor\""},{\""key\"":\""9OYxXgE2CA\"",\""name\"":\""\"",\""data\"":{\""tag\"":\""h3\"",\""text_align\"":\""left\"",\""link\"":\""\"",\""link_external\"":0,\""title\"":\""This is heading element\""},\""element_style\"":{},\""element_name\"":\""element_heading\""},{\""key\"":\""39tQ0sF9jo\"",\""name\"":\""\"",\""data\"":{\""image_zoom\"":false,\""link_external\"":0,\""link\"":\""\"",\""url\"":\""https://storage.googleapis.com/sg-dev-set-mis-cms/WEB_SETINVESTOR/Images/2020/Oct/ebook1_lightgrey%402x-23131012.jpg?ver=20201103064916\"",\""media_uuid\"":\""e502306f-b0fc-4a3b-9c7d-3e8e7d4743e5\""},\""element_style\"":{},\""element_name\"":\""element_image\""},{\""key\"":\""5Ms2Ow8VzG\"",\""name\"":\""\"",\""data\"":{\""height\"":\""15px\""},\""element_style\"":{},\""element_name\"":\""element_spacer\""},{\""key\"":\""xO3wOTsqg0\"",\""name\"":\""\"",\""data\"":{\""html\"":\""%3Cp%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/p%3E\""},\""element_style\"":{},\""element_name\"":\""element_text_editor\""},{\""key\"":\""oK6L4LWWtt\"",\""name\"":\""\"",\""data\"":{\""tag\"":\""h3\"",\""text_align\"":\""left\"",\""link\"":\""\"",\""link_external\"":0,\""title\"":\""This is heading element\""},\""element_style\"":{},\""element_name\"":\""element_heading\""},{\""key\"":\""KtuLewFCJY\"",\""name\"":\""\"",\""data\"":{\""html\"":\""I%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3Cbr%20/%3E%3Col%3E%3Cli%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/li%3E%3Cli%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/li%3E%3Cli%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/li%3E%3C/ol%3E\""},\""element_style\"":{},\""element_name\"":\""element_text_editor\""},{\""key\"":\""zhyBppQoze\"",\""name\"":\""\"",\""data\"":{\""tag\"":\""h3\"",\""text_align\"":\""left\"",\""link\"":\""\"",\""link_external\"":0,\""title\"":\""This is heading element\""},\""element_style\"":{},\""element_name\"":\""element_heading\""},{\""key\"":\""ZO8KcYDvRq\"",\""name\"":\""\"",\""data\"":{\""html\"":\""%3Cp%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/p%3E\""},\""element_style\"":{},\""element_name\"":\""element_text_editor\""},{\""key\"":\""meh9Icquqk\"",\""name\"":\""\"",\""data\"":{\""media_uuid\"":\""e502306f-b0fc-4a3b-9c7d-3e8e7d4743e5\"",\""url\"":\""https://storage.googleapis.com/sg-dev-set-mis-cms/WEB_SETINVESTOR/Images/2020/Oct/ebook1_lightgrey%402x-23131012.jpg?ver=20201103064216\"",\""link\"":\""\"",\""link_external\"":0,\""image_zoom\"":false},\""element_style\"":{},\""element_name\"":\""element_image\""},{\""key\"":\""ZSxxfrXjvX\"",\""name\"":\""\"",\""data\"":{\""html\"":\""%3Cp%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3Cbr%20/%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3Cbr%20/%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3Cbr%20/%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3Cbr%20/%3EI%20am%20text%20block.%20Click%20edit%20button%20to%20change%20this%20text.%20Lorem%20ipsum%20dolor%20sit%20amet,%20consectetur%20adipiscing%20elit.%20Ut%20elit%20tellus,%20luctus%20nec%20ullamcorper%20mattis,%20pulvinar%20dapibus%20leo.%3C/p%3E\""},\""element_style\"":{},\""element_name\"":\""element_text_editor\""},{\""key\"":\""jEZDKUkn7f\"",\""name\"":\""\"",\""data\"":{\""height\"":\""30px\""},\""element_style\"":{},\""element_name\"":\""element_spacer\""},{\""key\"":\""icNppGZi9m\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_keyword\""},{\""key\"":\""lvClZPhFt9\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""d-none d-lg-flex\""},\""element_name\"":\""container_full\""},{\""key\"":\""ZbsgnAg3Gb\"",\""name\"":\""\"",\""data\"":{\""banner_name\"":\""Banner - layout\"",\""banner_uuid\"":\""314a9686-341f-4cdc-b163-564237f26b50\""},\""element_style\"":{},\""element_name\"":\""element_banner\""},{\""key\"":\""4sUdmAK7QG\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""d-none d-lg-block\""},\""element_name\"":\""element_elearning\""},{\""key\"":\""q27uX0nXnB\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""d-none d-lg-block\""},\""element_name\"":\""element_event\""},{\""key\"":\""5U52Wfgjlq\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""d-none d-lg-block\""},\""element_name\"":\""element_recommended_follow_group\""},{\""key\"":\""pkozHtkSBl\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_related_articles\""},{\""key\"":\""FyDNpsjB5x\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_content_recommendations\""},{\""key\"":\""Z1TW7sY7yW\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{\""custom_class\"":\""d-flex d-lg-none\""},\""element_name\"":\""container_full\""},{\""key\"":\""aEgwrqI9IH\"",\""name\"":\""\"",\""data\"":{\""banner_uuid\"":\""314a9686-341f-4cdc-b163-564237f26b50\"",\""banner_name\"":\""Banner - layout\""},\""element_style\"":{},\""element_name\"":\""element_banner\""},{\""key\"":\""bRoFU6rarp\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_elearning\""},{\""key\"":\""3DNleDHMss\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_event\""},{\""key\"":\""EljeensukB\"",\""name\"":\""\"",\""data\"":{},\""element_style\"":{},\""element_name\"":\""element_recommended_follow_group\""}]}";

        RegexOptions options = RegexOptions.Multiline;

        Regex regex = new Regex(patternSub, options);

        foreach (Match m in Regex.Matches(str, patternMatch, options))

        {

            Console.WriteLine(regex.Replace(m.Value, ""));

        }

    }

}

​