{
  "operation": "Preview or Apply Text Animation Preset Keyframes to a Timeline Track",
  "method": "POST",
  "path": "/api/video/text-animations",
  "request": {
    "action": "preview",
    "presetId": "string",
    "startMs": 1.0,
    "durationMs": 1.0,
    "intensity": 1.0,
    "projectId": "string",
    "trackId": "string"
  },
  "response": {
    "message": "Preview keyframes payload"
  }
}