title: How to track mix panel time event with properties?
body: <p>I am using mix panel and want to track that how long user spent time in some page. I know that this can be achieved by <code>Mixpanel.sharedInstance().timeEvent(eventName)</code> and to stop tracking time of that event code is <code>Mixpanel.sharedInstance().track(eventName)</code> , now mix p panel suggest that pass as many properties as possible in just one mix panel call. I want to do that when user leaves a page and I stop taking that duration event at that time I use method <code>Mixpanel.sharedInstance().track(eventName)</code> , so I want to pass properties also in that event , is it good approach to pass properties with stop duration tracking event? Will that work as expected? Or I need to track properties separately? Suggest me some way.</p>