John, yes that is correct, Event-triggered Action Sequences only pick up the first argument, and the argument is expected to be an object of key-value pairs. When you use the “Publish Event” action, each Parameter that you define will be incorporated as a key-value pair into a single JavaScript object which will be sent to subscribers as a single argument, as you have shown above, e.g. { Parameter1: ParameterValue1, Parameter2: ParameterValue2 }. When you define Event-triggered Action Sequences, you can declare expected Inputs to the sequence, with each Input’s Name/Value mapping to the parameter names/values that were published.
When you use the publish/subscribe API via JavaScript, you have more flexibility to publish multiple arguments and have subscription functions pick up on the additional arguments.
