curl --request GET \
  --url https://api.heygen.com/v3/lipsyncs/{lipsync_id} \
  --header 'x-api-key: <api-key>'

{
  "data": {
    "id": "<string>",
    "title": "<string>",
    "duration": 123,
    "video_url": "<string>",
    "caption_url": "<string>",
    "callback_id": "<string>",
    "created_at": 123,
    "failure_message": "<string>"
  }
}