Invalid REST API return type - quoted string instead of json/xml

POST baseUrl/admin/containers/containerId/tasks/taskId/reassignments returns a number (not sure what the number represents) regardless of Accept header (application/json or application/xml) ...

When starting a case (and starting a process???, need to verify), whatever Accept header is specified (application/json or application/xml) a quoted string is returned.

It should return a valid object or a valid Accept header should only be text/plain.

This causes problem with any automation scripts that expect valid json / xml objects.