Apply payment source

POST https://{{apiDomain}}/v1/shoppers/me/carts/active/apply-payment-method.json

Apply the payment source to the active cart.
https://docs.digitalriver.com/commerce-api/payments/sources#attaching-a-payment-method-to-an-order-or-cart

Request Body

{"paymentMethod"=>{"sourceId"=>"{{sourceId}}"}}