{
  "session_id": "20260905-040419_Anna",
  "lang": "de",
  "language": "Deutsch",
  "narrator": "Anna",
  "user_agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:155.0) Gecko/20100101 Firefox/155.0",
  "mime_type": "audio/webm;codecs=opus",
  "container": "webm",
  "started": "2026-09-05T09:04:19+00:00",
  "ended": "2026-09-05T09:04:25+00:00",
  "duration_sec": 5.15,
  "chunks": 3,
  "bytes": 85815,
  "status": "done",
  "last_chunk_at": "2026-09-05T09:04:25+00:00",
  "file": "20260905-040419_Anna.webm",
  "client_duration_sec": 6,
  "wav": "20260905-040419_Anna.wav",
  "ffmpeg_error": null
}