We have tried everything we can see. Our last attempt added a ‘shipFrom’ block as mentioned in some Amazon samples. The shipment update is accepted without error, however the ‘Ship From’ in seller central is always the same, default warehouse. Anyone have any experience with this?

{
“packageDetail”: {
“packageReferenceId”: “xxxxxxxxxx”,
“carrierCode”: “FedEx”,
“shippingMethod”: “FedEx Ground”,
“trackingNumber”: “xxxxxxxxxxxxx”,
“shipFrom”: {
“name”: “Sikeston”,
“addressLine1”: “xxxxxxxxxx”,
“addressLine2”: “”,
“city”: “Sikeston”,
“stateOrRegion”: “Missouri”,
“postalCode”: “xxxxx”,
“countryCode”: “US”
},
“shipDate”: “2024-07-03T00:00:00Z”,
“orderItems”: [
{
“orderItemId”: “xxxxxxxxx”,
“quantity”: 1
}
]
},
“marketplaceId”: “xxxxxxxxxxx”
}