Thanks for the response SiKing. Unfortunately, it didn't entirely solve my problem.
In the Property Transfer step when I had this set to Response with an XML Response I had //Document/DocumentId to grab the data from the node.
As you suggested in the Property Transfer step I changed the Source Property to "ResponseAsXml" with a JSON response.
I didn't expect the //Document/DocumentId to work and it didn't with the JSON response.
I am fairly knew to XPath and am not sure what the correct XPath reference should be to access the same node I was using with the XML response.