Looking for examples of creating a JSON web service as "business service" and converting the JSON data received to a HL-7 message in a Transformation.

HI,

I'm migration an existing integration to InterSystems.  The upstream (external) system calls a JSON web service hosted in the interface engine, which converts the JSON data received to an HL-7 messages to send to the downstream system. I'm looking for direction and example of how to do the equivalent in InterSystems, so the the upstream system only has to modify the URL of the web service they call.

I suppose in IS we'll need to create a business service that is a JSON web service?  How to access the JSON data (parameters in the web service call) in the Transformation?

Thank you!

W