Funnel imports data from Mixpanels data export api. Where each row contains an Event and its Properties.
Some fields are mandatory for Funnel to process the data. These include event and Mixpanels reserved properties time and $distinct_id. The timestamp property is parsed to the timezone you set when connecting in Funnel.
An Event can hold any type of property, all of which are parsed to dimensions and treated as strings. Lists from Properties are parsed into strings and dictionaries are excluded from the import. The only metric currently included in the connector is event_count, a simple aggregation of event.