Non-string metadata (ie Boolean, Numbers, DateTime)

[bluerssen]

We have data coming from Segment events that we'd like to pipe into Plunk, but it doesnt appear that we can send in non-string data. What about booleans, dates, numbers, etc. Are there any plans to allow us to send in and utilize these types of metadata when creating campaigns or actions?

[driaug]

Closing this in preparation of next branch.