Required Fields for Authorizing a Payment Using Mastercard and the Merchant Decryption Method {#samsungpay-auth-merdecypt-mc-mandatory}
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The following fields are required when submitting an authorization request using the Merchant decryption method:

* card_accountNumber-set this field to the payment network token value.
* card_expirationMonth-set this field to the payment network token expiration month value.
* card_expirationYear-set this field to the payment network token expiration year value.
* ccAuthService_commerceIndicator- set this field to `spa`.
* ccAuthService_networkTokenCryptogram-set this field to the network token cryptogram.
* paymentNetworkToken_transactionType-set this field to `1`.
* paymentSolution-set this field to `008`.
* ucaf_authenticationData--set this field to the 3-D Secure cryptogram of the payment network token.
* ucaf_collectionIndicator-set this field to `2`.

Related Information {#samsungpay-auth-merdecypt-mc-mandatory_section_abb_khn_b1c}
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[Simple Order API Field Reference Guide](https://developer.cybersource.com/docs/cybs/en-us/api-fields/reference/all/so/api-fields/api-fields-so-intro.md "")