using System;

public class Program

{

    public static void Main()

    {

        string jsonData = "{\"number\":\"TEST0000001005\",\"pin\":\"TEST10005\",\"folio\":\"FL10005\"}";

        string data = "";

        string fields = "";

        if(!string.IsNullOrEmpty(jsonData))

        {

            jsonData = jsonData.Replace("{","").Replace("}","");

            var dataProcess = jsonData.Split(',');

            foreach(string nodeData in dataProcess)

            {

                //Console.WriteLine(nodeData);

                if(nodeData.ToLower().Contains("number"))

                {

                    data = nodeData;

                }else 

                {

                    string[] fieldValues = nodeData.Split(':');

                    fields += "{ \"key\":" + fieldValues[0] + ", \"value\":"+ fieldValues[1] +" },";

                }

            }

        }

        string allData = "{"+ data +", \"fields\":[" + fields.Substring(0, fields.Length - 1) + "]}";

        Console.WriteLine(allData);

    }

}