The envelope resource.type is order, and delivery.source says who handles the shipment. Your own updates come back to you too, so compare with what you hold. Use it to follow a tracking number and to tell the customer. See Delivery companies.
Payload data
Every event arrives in the standard webhook envelope. These are the fields of data.
order_idstring
Order ID.
numberinteger
Display order number.
deliveryobject
source, app_id, option_id, label, carrier, status, tracking_number, tracking_url and updated_at.