Retrieve a url to upload a file to a field

Start the file upload process for a given entity property.
Use the retrieved file_upload_url to upload the file to the storage.
After file is uploaded use returned confirm_upload_url to confirm the upload.
Be sure to use provided confirm URL as this request may redirect you to different
Sub-Project as result of upload initiation.

Click Try It! to start a request and see the response here!