Send entire message from process to WCF Service

I am using the Service widget (the publish widget is not passing paraemeter value through correctly)
In this call to my service, I want to send the entire message as a parameter to the service.

How do I go about constructing a transform that will take the entire message and transform it into a parameter.

For example:

I have a method in the service called UpdateData (string messageData)

the example I have shows how to construct a transform for a single string parameter named Arg1 in the xml














but instead of inspecting the XML to find the Arg1 element, I simply want to include the entire message inside of






INCLUDE THE ENTIRE MESSAGE HERE IN THE TRANSFORMED OUTPUT







Thoughts?