{
  "success": true,
  "lead": {
    "id": "123e4567-e89b-12d3-a456-426614174000",
    "first_name": "Carlos",
    "last_name": "Rodriguez",
    "phone": "+56987654321",
    "metadata": {
      "edad": 35,
      "utm_source": "google",
      "estado_lead": "calificado",
      "broker_asociado": "Maria Gonzalez"
    },
    "created_at": "2026-02-10T12:00:00Z"
  }
}

{
  "error": "Validation error",
  "message": "No fields to update"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "Not found",
  "message": "Lead not found or does not belong to your account"
}

{
  "error": "<string>",
  "message": "<string>"
}