curl --location --request POST 'https://demo.myshopify.com//admin/api//orders//fulfillments//events.json'
null
if no tracking number is available or if the tracking number is from an unsupported carrier. This property is available only when carrier calculated rates are in use.'{
"fulfillment_event": {
"id": 944956392,
"fulfillment_id": 255858046,
"status": "in_transit",
"message": null,
"happened_at": "2023-01-03T12:59:00-05:00",
"city": null,
"province": null,
"country": null,
"zip": null,
"address1": null,
"latitude": null,
"longitude": null,
"shop_id": 548380009,
"created_at": "2023-01-03T12:59:00-05:00",
"updated_at": "2023-01-03T12:59:00-05:00",
"estimated_delivery_at": null,
"order_id": 450789469,
"admin_graphql_api_id": "gid://shopify/FulfillmentEvent/944956392"
}
}