Standard way of confirmation in Ember & JSON

I have micro actions that just adds votes for any post using REST. There is a JSON confirmation response on each request like { message: "Post voted successfully"} Is there a standard JSON response that i should follow?

I think the options are

  1. Return Object. Which i believe is too much for a micro action
  2. Return as Meta data, but there will be no object attached.
  3. Don’t Return anything