using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        JObject recordObject = new JObject();

        recordObject.Add("CUSTOMER_COMPANY_NAME", JObject.Parse(@"{ PropertyA: 1 }"));

        //recordObject["CUSTOMER_COMPANY_NAME"] = JObject.Parse() new { PropertyA = 1 };

        Console.WriteLine(recordObject);

        dynamic input = new 

        {

            CUSTOMER_COMPANY_NAME = new { PropertyA =  1 },

            Customer_Number = "12345"

        };

        JObject jObj = JObject.FromObject(input);

        Console.WriteLine(jObj);

    }

}