Get shipments of an order

{
    "orderNumber": "10000045686",
    "shipments": [
        {
            "carrier": "FedEx",
            "shippingMethod": "FedEx Ground",
            "trackingNumber": "392964503590",
            "shipmentDate": "2023-12-01",
            "shipmentItems": [
                {
                    "externalItemId": "1",
                    "product": "8x10 0.75in Stretched Canvas",
                    "quantity": 1
                }
            ]
        }
    ]
}