post https://marketplace.walmartapis.com/v3/fulfillment/shipment-tracking
Capture tracking information from sellers. For small parcel shipments, sellers must provide the tracking information, including carrier name and tracking numbers. WFS uses the data to capture updated expected delivery date to adjust the fulfillment inbound capacity to avoid any receiving delays. Sellers can also view the updated expected delivery date through the Seller Center UI or by calling the Get Inbound Shipment Items API.