using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string s1 = @"

{

  ""product_id"": ""1777"",

  ""license_key"": ""ECHOES-SILENCE-PATIENCE-AND-GRACE"",

  ""valid_for"": ""365"",

  ""status"": ""active"",

  ""times_activated_max"": 1

}";

        string s2 = @"

{

  ""name"":""John"",

  ""age"":30,

  ""cars"":[""Ford"", ""BMW"", ""Fiat""]

}";

        JObject o1 = JObject.Parse(s1);

        JObject o2 = JObject.Parse(s2);

        o1.Merge(o2);

        Console.WriteLine(o1);

    }

}