As shown in the first screen, we want to send a BOD to an ION API.

The first task of the document flow is an application that sends a BOD from LN, the second task contains a GET call from a REST Web Service that returns a JSON and the third one is a file task that should obtain the JSON response.

As shown in the second screen we pass an hard coded test parameter to the GET call and it works. Is it possible to pass a value from the BOD?
We also want to write the JSON response to a document and do a mapping with a BOD. We wondered how "Manual mapping" works and if it's possible to do so.
In the ION API documentation there isn't any information about this, any help will be appreciated.
Thank you very much