Objeto PaymentDiscount

• identifier string - Una cadena usada para identificar de forma única una oferta de descuento para un producto.
• keyIdentifier string - A string that identifies the key used to generate the signature.
• nonce string - A universally unique ID (UUID) value that you define.
• signature string - A UTF-8 string representing the properties of a specific discount offer, cryptographically signed.
• timestamp number - The date and time of the signature's creation in milliseconds, formatted in Unix epoch time.