curl --request POST \
  --url https://geoff.ai/api/v1/voice/clone \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
    "audio_file_id": "file_abc123",
    "prompt_file_id": "file_def456",
    "name": "My Custom Voice"
  }'

{
  "data": {
    "voice_id": "voice_xyz789",
    "name": "My Custom Voice",
    "status": "ready"
  }
}