Hello,    Currently, newly created asset's reference number is returned in the POST > Response Headers "Location".  For the lineNumbers, there should be a different logic since there are scenarios of 500+ lines are being POSTED via API so this wouldn't be graceful to include all these line numbers in the response headers. They may even be overridden if user make any changes in the UI. Please register this at the Ideas part then it can be evaluated by the team.  ... View more