using System;

public class Program

{

    public static void Main()

    {

        var t="AQGQAbBZ8ggvezukCwAAAGIxkRLVHwAAAAAAAAAAAACC74FEV1/XCNe2LFQCAAAAAAAAAACKAAAA8FYEeRte1wgAAAAAAAAAAAAAAAAAAAAAAAAAAA==";

        var b=Convert.FromBase64String(t);

        var market = b[0];

        var messageType = BitConverter.ToUInt32(b, 4);

        Console.WriteLine(string.Format("MarketType={0}",market));

        Console.WriteLine(string.Format("MessageType={0}",messageType));

    }

}