Remember if your bookmarking a URL then you need to provide the ‘id’ as a part of the URL. You can’t pass objects only object id’s.
@IonicPage({
name: 'VenuePage',
segment: 'venue/:id'
})
...
constructor(public navCtrl: NavController,
public navParams: NavParams,
private venuesService: VenuesService,
private logger: LoggerService) {
this.itemId = navParams.get('id');
}