I have a RESTful WCF service with a method declared like this:

[OperationContract(Name = "IncrementAge")]
[WebInvoke(UriTemplate = "/", Method = "POST", ResponseFormat = WebMessageFormat.Json)]
Person IncrementAge(Person p);

Here's the implementation:

public Person IncrementAge(Person p)
{
            p.age++;

            return p;
}

So it takes the Person complex type, increments the age property by one, and spits it back, using JSON serialization. I can test the thing by sending a POST message to the service like this:

POST http://localhost:3602/RestService.svc/ HTTP/1.1
Host: localhost:3602
User-Agent: Fiddler
Content-Type: application/json
Content-Length: 51

{"age":25,"firstName":"Hejhaj","surName":"Csuhaj"}

This works. What if I'd like to have a method like this?

Person IncrementAge(Person p, int amount);

So it'd have multiple parameters. How should I construct the POST message for this to work? Is this possible?

Thanks