using System.Collections.Generic;
using Newtonsoft.Json;

namespace Test
{
    class EmailData
    {
        public int Type { get; set; }
    }

    class ApiData
    {
        [JsonProperty("request.id")]
        public int? RequestId { get; set; }

        [JsonProperty("list")]
        public Dictionary<string, EmailData> EmailDictionary { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var data = JsonConvert.DeserializeObject<ApiData>(@"
                             {
                              ""request.id"": null,
                              ""list"": {
                                ""email1@email.com"": {
                                  ""Type"": ""1""
                                },
                                ""email2@email.com"": {
                                  ""Type"": ""1""
                                },
                                ""email3@email.com"": {
                                  ""Type"": ""1""
                                }
                              }
                            }"
                        );
        }
    }
}