External resources such as images or PDFs need to be processed separately from the JSON or XML request body. In order to include an image on a form (either during creation or updating after the fact), the following actions need to be performed.
- Upload the image using the Files endpoint. See Uploading a file for more details.
- After the image has being uploaded, obtain the Id of the file.
- Include the Id as the value of the
idproperty on the image field when creating a new form or updating an existing form.