using System;

using System.Collections.Generic;

using Newtonsoft.Json;

​

public class Program

{

    public static void Main()

    {

        var inJson = @"{

        ""properties"": {

            ""shortDescription"": {

              ""contains"": false,

              ""equals"": false,

              ""startsWith"": true,

              ""value"": ""some text""

            },

            ""description"": {

              ""contains"": true,

              ""equals"": false,

              ""startsWith"": false,

              ""value"": ""some more text""

            },

            ""createdAfter"": {

              ""contains"": false,

              ""equals"": false,

              ""startsWith"": false,

              ""value"": ""2021-08-17""

            }

        },

        ""notes"": ""Something bad happened"",

        ""group"": ""some group"",

        ""assigned"": ""to me""

        }";

        var deserialized = JsonConvert.DeserializeObject<filter_keys>(inJson);

        Console.WriteLine(deserialized.notes);

        foreach(var prop in deserialized.properties)

        {

            Console.WriteLine(prop.Key);

            Console.WriteLine(prop.Value.value);

        }

​

    }

​

    public class filter_keys

    {

        public string notes { get; set; }

        public string group { get; set; }

        public string assigned { get; set; }

        public Dictionary<string, filter_properties> properties { get; set; }

    }

    public class filter_properties

    {

        public bool contains { get; set; }

        public bool equals { get; set; }

        public bool startsWith { get; set; }

        public string value { get; set; }

    }

}