using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var json = "{ \"psychoal3x\":{ \"id\":36564871, \"name\":\"PsychoAl3x\", \"profileIconId\":1394, \"summonerLevel\":30, \"revisionDate\":1481230226000 } }";

        var data = JsonConvert.DeserializeObject<Dictionary<string, SummonerDto>>(json);

        Console.WriteLine(data.First().Value.Name);

    }

}

​

public class SummonerDto

{

    public int Id { get; set; }

    public string Name { get; set; }

    public int ProfileIconId { get; set; }

    public int SummonerLevel { get; set; }

    public long RevisionDate { get; set; }

}