RadioAudioEvent

Não usa o envelope padrão — sem organization_id.

{
    "event": "audio.approved",
    "contact": {
        "name": "string",
        "phone": "string"
    },
    "audio_url": "http://example.com",
    "transcription": "string",
    "duration_seconds": 0,
    "received_at": "2019-08-24T14:15:22.123Z"
}