using System;

using Newtonsoft.Json;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var js = @"{

""data"":{

  ""participation"":{

     ""id"":""ptn-myId"",

     ""firstName"":""Sharon"",

     ""photoKey"":""myUrl""

  }

 }

}";

        var des = JsonConvert.DeserializeObject<Root>(js);

        Console.WriteLine(des.Data.Participation.FirstName);

    }

​

    public partial class Root

    {

        [JsonProperty("data")]

        public Data Data

        {

            get;

            set;

        }

    }

​

    public partial class Data

    {

        [JsonProperty("participation")]

        public Participation Participation

        {

            get;

            set;

        }

    }

​

    public partial class Participation

    {

        [JsonProperty("id")]

        public string Id

        {

            get;

            set;

        }

​

        [JsonProperty("firstName")]

        public string FirstName

        {

            get;

            set;

        }

​

        [JsonProperty("photoKey")]

        public string PhotoKey

        {

            get;

            set;

        }

    }

}