This reference document lists and describes all event tracking dimensions and metrics available through the Real Time Reporting API.
Not all dimensions and metrics can be queried together. Review the Query Constraints section in the Dev Guide for additional details.
Dimensions
rt:eventAction
The action of the event.
rt:eventCategory
The category of the event.
rt:eventLabel
The label of the event.
Metrics
rt:totalEvents
The total number of events for the view (profile), across all categories.