Retrieve transcript text

{
  "status": "completed",
  "text": "<string>",
  "vault_id": "<string>",
  "object_id": "<string>",
  "source_object_id": "<string>",
  "transcript_object_id": "<string>",
  "transcription_job_id": "<string>",
  "filename": "<string>",
  "word_count": 123,
  "confidence": 123,
  "audio_duration": 123
}