using System;

using System.Collections.Generic;

​

using System.Globalization;

using Newtonsoft.Json;

using Newtonsoft.Json.Converters;

​

using System.Linq;

public class Program

{

    public static void Main()

    {

             string input = @"42[""cti-agentes"",""{

    \""6139\"":{

        \""id_agents_interface\"":\""453\"",

        \""agent\"":\""6139\"",

        \""interface\"":\""contact1\"",

        \""logintime\"":\""2019-11-26 15:08:46\"",

        \""pausetime\"":\""2019-12-31 13:28:36\"",

        \""paused\"":\""si\"",

        \""id_pausa\"":null,

        \""invalid\"":\""no\"",

        \""invalidtime\"":null,

        \""fullcontact\"":\""contact1\"",

        \""textoterminal\"":\""contact1\""

        },

    \""6197\"":{

        \""id_agents_interface\"":\""5743\"",

        \""agent\"":\""6197\"",

        \""interface\"":\""contact1\"",

        \""logintime\"":\""2020-01-16 10:16:17\"",

        \""pausetime\"":null,

        \""paused\"":\""no\"",

        \""id_pausa\"":null,

        \""invalid\"":\""no\"",

        \""invalidtime\"":null,

        \""fullcontact\"":\""contact2\"",

        \""textoterminal\"":\""contact2\""

        }

}""]";

        Console.WriteLine(input);

        var withoutNumberPrefix = new string(input.SkipWhile(c=> Char.IsDigit(c)).ToArray());

        var fixedSize = input.Substring(2, input.Length - 2);

        var always42 = input.TrimStart(new[] { '4', '2' });

​

​

        var listResults = JsonConvert.DeserializeObject<string[]>(fixedSize);

        // my guess is that The first string is the name of the type. and the second the dictionary holding them.

        Console.WriteLine(listResults[0]);

        var result =  JsonConvert.DeserializeObject<Dictionary<int,CtiAgentes>>(listResults[1]);

        result[6139].Dump();

    }

     public partial class CtiAgentes

    {

        [JsonProperty("id_agents_interface")]

        public int IdAgentsInterface { get; set; }

​

        [JsonProperty("agent")]

        public int Agent { get; set; }

​

        [JsonProperty("interface")]

        public string Interface { get; set; }

​

        [JsonProperty("logintime")]

        public DateTimeOffset Logintime { get; set; }

​

        [JsonProperty("pausetime")]

        public DateTimeOffset? Pausetime { get; set; }

​

        [JsonProperty("paused")]

        public string Paused { get; set; }

​

        [JsonProperty("id_pausa")]

        public object IdPausa { get; set; }

​

        [JsonProperty("invalid")]

        public string Invalid { get; set; }

​

        [JsonProperty("invalidtime")]

        public object Invalidtime { get; set; }

​

        [JsonProperty("fullcontact")]

        public string Fullcontact { get; set; }

​

        [JsonProperty("textoterminal")]

        public string Textoterminal { get; set; }

    }

}