This endpoint can be called to simulate an already existing Cloud Action. It can be used to help build
and debug any Cloud Actions that are part of your solution. The provided JavaScript will be
executed, but the output Events will not be persisted. Instead, all results will be shown to the user.
The supplied Event is used as the input (argument) to the supplied JavaScript function.
The simulator output will contain the function return value: a map of destinations to list of Events.
As well as a log, which is a list of the variables of your running script on each line number in the order they were executed.
The variables that are unchanged will not be reprinted.