modify notification before displaying on the notification bar Ionic 3?

Question

1. i am implementing push notification in IONIC 3 and using phonegap-plugin-push
2. now i want to modify data before displaying notification on notification bar

3. here is my code

   pushNotificationSetup() {
     const options: PushOptions = {
     android: {
       senderID: 'xxxxxxxxx',
       icon: 'icon',
       sound: true,
       vibrate: true
     },
     ios: {
       alert: true,
       badge: true,
       sound: true,
     }
     };
     const pushObject: PushObject = this.push.init(options);
     pushObject.on('notification').subscribe((notification: any) => {
       this.utilService.showToastMsg("success", notification.message);
     });
   
     pushObject.on('registration').subscribe((registration: any) => {
       this.storageService.setLocalStorage('registered-device', registration.registrationId);
     });
   
     pushObject.on('error').subscribe(error => console.error('Error with Push plugin', error));
   }