Create a ten-minute, one-use capability for raw audio, video, PDF/image or score-file bytes. filename is required; size optionally binds the capability to an exact byte count. Maximum size is 100 MiB. Returns job ID and HTTPS upload URL accepting one application/octet-stream POST without API credentials. HTTP 202 means upload acceptance, not processing completion. provider selects local, piano or mirelo; supplied bpm/pro_options and view are retained. Pro holds review and price consent; replay_only prevents new supplier submission.