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

{
  "data": {
    "voice_id": "<string>",
    "support_pause": true,
    "name": "<string>",
    "language": "<string>",
    "gender": "<string>",
    "preview_audio_url": "<string>",
    "status": "processing",
    "failure_message": "<string>",
    "support_interactive_avatar": false,
    "created_at": 123
  }
}