OIC REST - how to save xml payload to ATP clob column opaquely

Summary

OIC REST - how to save xml payload to ATP clob column opaquely

Content

I am trying to build a simple REST integration that when called from Postman with an xml payload, will save the xml to an ATP database clob column opaquely.  By opaquely, I mean just saving the entire xml payload as text in a clob.  I can't seem to get the xml payload to map to the clob column.  The insert works for the rec_id primary key column, but the clob column is null after the insert.  See the attached Word document which has the screen shots and appropriate information.