post https://marketplace.walmartapis.com/v3/orders//acknowledge
Use this API to acknowledge an entire order, including all of its order lines.
Walmart requires sellers to acknowledge orders within four hours of receipt, except in extenuating circumstances.
The response to a successful call contains the acknowledged order.
Only orders in a Created state should be acknowledged. As a best practice, acknowledge orders promptly to avoid underselling.
Orders in an Acknowledged state can be re-acknowledged, for example, in response to an error from an earlier acknowledgment attempt.
Orders with line items that are shipped or canceled should not be re-acknowledged.