How to set up a minimal CKSubscription?

I want to set up a simple CKSubscription that notifies me a recordType was created, how?

After experimenting a while this is how to setup a minimal CKSubscription. You have to test it on Device, push notification does not work on simulator. You can add record in Dashboard, that will trigger push notification too.

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {

    application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: .Alert, categories: nil))
    application.registerForRemoteNotifications()
        return true
}

func someFunc() { // <- you need to call once in app life time, and again when it was removed / installed 
     let defaultContainer = CKContainer.defaultContainer()
     let publicDatabase = defaultContainer.publicCloudDatabase   
     let subs = CKSubscription(recordType: "xxx", predicate: NSPredicate(value: true), subscriptionID: "yyy", options: .FiresOnRecordCreation)
     subs.notificationInfo = CKNotificationInfo()
     subs.notificationInfo.alertBody = "New item added"
     publicDatabase.saveSubscription(subs, completionHandler: {subscription, error in})
}

func application(application: UIApplication!, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]!)
{
    // <- this method will invoked
}