Actualización de pago

{
    "id": "string",
    "user": "string",
    "amount": 0,
    "fee": 0,
    "status": "processed",
    "paid": true,
    "requestedAt": "2026-01-01T00:00:00.000Z",
    "paidAt": "2026-01-01T00:00:00.000Z"
}