Hello, How does { "<materialId>":{ "id":"<materialId>", "type":"object", "description":"Material Object", "properties":{ "markup":{ "type":"float", "description":"Markup amount" }, "isActive":{ "type":"boolean", "description":"Is this material active" } } } } look in the $data array of the POST /models/v1 request? I can not find the right syntax to make it work...