In the [full documentation](http://mixpanel.github.io/mixpanel-python/) there are no clear definitions for the meta argument, which is used for all requests. Also seems different methods require different shapes of meta argument. For instance, I have used [Mixpanel.people_set](https://mixpanel.github.io/mixpanel-python/#mixpanel.Mixpanel.people_set) method passing `$latitude` and `$longitude` through meta argument to update account geolocation and it works perfectly. Yet sending those values through meta argument in [Mixpanel.track](https://mixpanel.github.io/mixpanel-python/#mixpanel.Mixpanel.track) method didn't produce any effect. It occurred I had to pass geolocation through properties parameter in [Mixpanel.track](https://mixpanel.github.io/mixpanel-python/#mixpanel.Mixpanel.track) Yet after reading [this answer](https://github.com/mixpanel/mixpanel-python/issues/47#issuecomment-83093772) for the related issue https://github.com/mixpanel/mixpanel-python/issues/47, I get a false assumption meta will be common for all requests. Based on this quote: > and the second one (meta) manages metadata about the operation itself.