Update a Helix Event

This method can be used to update a Helix Event that has already been posted to Command. This is especially useful if a user needs to add an additional attribute key to the existing event, along with its new corresponding value. To successfully update a Helix Event, users will need to input the associated Organization ID, Camera ID, API Key, Event Type UID, exact event epoch time in milliseconds, as well as the new attribute key and attribute value that is being updated.