Unable to cancel Android inapp subscription

For testing purposes, I am trying to unsubscribe inapp for an Android app. I am using the standard API call defined at https://developers.google.com/android-publisher/api-ref/purchases/subscriptions/revoke and it doesn't respond to errors. However, after calling the get API, I get a response like:

{
 "kind": "androidpublisher#subscriptionPurchase",
 "startTimeMillis": "1418380314678",
 "expiryTimeMillis": "1421058696393",
 "autoRenewing": true
}

      

        
        
        
      

    

So, nothing has changed and even the subscription I'm trying to cancel is still active when I get the full subscription list. The strangest thing is the code I'm running for the review is working two weeks ago. What am I missing with Android subscriptions?