What's the correct way of using the /Thingworx/Importer API resource?
I thought I could sneakily work out how to use this by using Firebug to look at the request made via Composer, but I always get an error in the Application log that says:
Forbidden file upload from https://x.x.x.x:y/Thingworx/Importer
(address redacted)
The curl command I have been trying to use to upload XML for a single (if that makes a difference) entity is:
curl --user 'Administrator:xxx' -F 'file=@entity.xml' 'https://x.x.x.x:y/Thingworx/Importer?purpose=import&usedefaultdataprovider=false&WithSubsystems=false'
(address and password redacted; and I've slightly simplified this curl request but only to omit --insecure because I'm using a self-signed certificate)
Where is this wrong...? Shouldn't I even be using the resource in this way?

