Return Tracking Id Updated

Description - Notification sent when tracking details for a customer return is updated.

EventStructure

{
    "returnId": "",
    "eventType": "return_item_tracking_id_update",
    "source": "",
    "timestamp": "",//ISO String
    "attributes": {
        "returnItems": [{
            "orderItemId": "",
            "trackingId": "", //Return tracking id
            "courierName": "" // Return courier name
        }]
    }
}