Type of PagerDuty to be sent. Can be trigger, acknowledge or resolve
PagerDuty Event source, i.e. a host or service
Event severity. Can be one of critical, error, warning or info
Must be in epoch time which will be re-formatted to ISO Format. If left blank, will consider the time of executing the action
Unique key for deduplication. This will be by default Episode Id

PagerDuty Events API v2 Fields Reference