descriptionStringRequired
A description the line item.
How to bill the Merchant for this Product.
redirectUrlStringRequired
URL used to redirect the Merchant after successfully completing the Checkout.
The product the Merchant will be entitled to after the Checkout is complete.
subscriptionIdStringOptional
When left blank, a new subscription will be created upon successful completion of the Checkout. To create a Checkout for updating an existing subscription, include the subscription ID of the existing subscription, which will be updated upon successful completion of the Checkout.
