Vault an existing PayPal Billing Agreement that was not created through Braintree. Only use this mutation if you need to import PayPal Billing Agreements from an existing PayPal integration into your Braintree account.
This mutation requires:
inputVaultTop-level fields returned when importing and vaulting a PayPal Billing Agreement.
paymentPaymentThe vaulted payment method containing the imported PayPal Billing Agreement.