receive requests in web servce rest in c #?

I have a web service api rest project in C # (basic) in VS, I program a POST method that does nothing at the moment, it only validates if information arrives or that I think it does ha, what I want to know is: when I send a Json chain from a client program, to be able to debug the reception of the request sent from my web service.
I want to see how my request arrives.