Details about the merchant cobranded card used for order purchase.
payeeobject<payee_base>Optionalemail_addressstring<email>OptionalNote: Up to 64 characters are allowed before and 255 characters are allowed after the@sign. However, the generally accepted maximum length for an email address is 254 characters. The pattern verifies that an unquoted@sign exists.
merchant_idstring<account_id>Optionalamountobject<money>Optionalcurrency_codestring<currency_code>RequiredvaluestringRequired