Step 2 of 3 in the file upload process. Returns the status and details of the most recently uploaded file in the current session, including the file ID and name needed for the final step.

After obtaining the file ID and name, combine them as {id}|{name} and use that in POST /api/v1/eventimport (to attach to an event) or POST /api/v2/person/save (to set as a user avatar).