curl --request POST \
  --url https://api.comm.com/api/v1/voice/agents/test-call \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from_number": 123,
  "to_number": 123,
  "prompt": "<string>",
  "agent_id": "<string>",
  "greeting_message": "<string>",
  "tools": [
    "<string>"
  ],
  "voice_id": "<string>",
  "language": "<string>"
}
'

{
  "data": {
    "call_id": "<string>"
  }
}