Speech Start

{
  "session_id": "4a39145c-2844-4557-8f34-34883f7be7d9",
  "created_at": "2021-09-01T12:00:00.123Z",
  "type": "speech_start",
  "data": {
    "time": 12.56,
    "channel": 1
  }
}