using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        //From : Ashish Wadekar

        string text = @"

.....inally{if(s)throw i}}return a}}(e,t)||xe(e,t)||we()}var Se=

JSON.parse('{""shortVersion"":""v3.1.56""}')

,Ne=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA

AASAAAAAqCAYAAAATb4ZSAAAACXBIWXMAAAsTAAALEw.....

";

    object obj= ExtractJsonFromText(text);

        Console.WriteLine(Convert.ToString(obj));

    }

     public static object ExtractJsonFromText(string mixedStrng)

    {

        for (var i = mixedStrng.IndexOf('{'); i > -1; i = mixedStrng.IndexOf('{', i + 1))

        {

            for (var j = mixedStrng.LastIndexOf('}'); j > -1; j = mixedStrng.LastIndexOf("}", j -1))

            {

                var jsonProbe = mixedStrng.Substring(i, j - i + 1);

                try

                {

                    return JsonConvert.DeserializeObject(jsonProbe);

                }

                catch

                {                        

                }

            }

        }

        return null;

    }

}