using System;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        var jsonString = "{ rawRequest: {asset: ['123', '456'] }}";

        var param = "rawRequest.asset[*]";

        JToken token = JToken.Parse(jsonString);

        token.SelectTokens($"$.{param}").Count().Dump();

    }

}