Changes the value of the specified custom property of a report element.
PUT /documents/<documentID>/reports/<reportID>/elements/<elementID>/properties
Request body: the custom property to edit (key and value).
Response type: application/xml or application/json
The response is a message stating the success or failure of the request.
PUT /documents/1234/reports/1/elements/100/properties
Request body:
<property key='NEW_KEY'>Modified Value</property>
Response:
<success> <message>The resource of type "Property" has been successfully updated.</message> <id>NEW_KEY</id> </success>