curl --request POST \
  --url https://api.quintus.tec.br/v1/public/agents/conversations/{conversation_id}/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "content": "<string>",
  "role": "user",
  "metadata": {}
}
'

{
  "agent_message": {
    "id": "<string>",
    "content": [
      {
        "text": "Hello agent",
        "type": "text"
      }
    ],
    "created_at": "2023-11-07T05:31:56Z",
    "metadata": {}
  }
}