Validate an order before placing it. It will respond with an error when:
Order token to authorize Cart and Checkout requests.
Set to true if the check for cart changes should be skipped
Specify the related resources you would like to receive in the response body. More Information.
Specify the fields you would like returned in the response body. More information.
200 Success - Returns the cart object.
The Cart provides a central place to collect information about an order, including line items, adjustments, payments, addresses, and shipments. Read more in Spree docs