Response to set a default payment method.
| contextName | string The unique integration provided context name that identifies the application context for the payment method. For example, "NYC bakery checkout" or "SF subscription". |
| paymentMethodId | string <uuid> The unique identifier of the payment method. |
{- "paymentMethodId": "b6df8625-cd25-4123-b345-638aa7b5d011",
- "contextName": "string"
}