1. Initiate Upload
presigned_url for single-part uploads or presigned_urls plus multipart_upload_id for multipart uploads.
2. Upload To Storage
For a single-part upload, send the file with the returnedrequired_headers.
3. Complete Upload
4. Use The Upload ID
After completion, use the upload session ID in fields such ascover_image_upload_session_id, preview_video_upload_session_id, video_upload_session_id, document_upload_session_id, image_upload_session_id, content_media[].upload_session_id, or resource_upload_session_ids.