sessionEvent

Session events occur when a user opens or returns to the app after some inactivity.

Field	Type	Description
attribution_id	string	justtrack's identifier for the attribution event tied to this install
install_id	string	justtrack's identifier for the install event tied to this event
session_start	timestamp	The date and time in UTC at which the event happened. This timestamp doesn't include the timezone.
session_length	int	The length of the session in seconds