Express Checkout Service
POST {{baseUrl}}/masterpass/expresscheckout
This service is used to retrieve the consumer's full payment card, shipping address, and recipient personal information from Masterpass when performing an Express Checkout. If the merchant is PCI-compliant, then this API will return the complete payload. If the merchant is not PCI-compliant, then this API will only return non-PCI data. In both cases, a new pairingId will be returned to the merchant. Request method: POST. API URL: /masterpass/expresscheckout