The stringified and base64 encoded `paymentData` you retrieved from the Apple framework.
checkoutAttemptId
string
The checkout attempt identifier.
fundingSource
string
The funding source that should be used when multiple sources are available. For Brazilian combo cards, by default the funding source is credit. To use debit, set this value to **debit**.
recurringDetailReference
string
This is the `recurringDetailReference` returned in the response when you created the token.
storedPaymentMethodId
string
This is the `recurringDetailReference` returned in the response when you created the token.