{
  "operation": "Preview or Apply Generated Subtitles from Script or Audio-Asset Transcript Into Timeline Track with Beat-Synced Kinetic Text",
  "method": "POST",
  "path": "/api/video/subtitles",
  "request": {
    "action": "preview",
    "transcript": "string",
    "audioAssetId": "string",
    "tone": "string",
    "locale": "string",
    "stylePresetId": "string",
    "trendKeywords": [
      "string"
    ],
    "syncToBeatGrid": true,
    "bpm": 60,
    "beatOffsetMs": -60000
  },
  "response": {
    "message": "Subtitle preview payload"
  }
}