Deprecated, use 'externalIds' instead. Shorthand for a single-entry 'externalIds'. For now, responses will keep returning 'externalId' with the first entry of 'externalIds'.
externalIdsstring[]
External identifiers for the channel. Replaces the full list; an empty array clears all external IDs. Mutually exclusive with externalId.
timeoutnumber
Timeout in seconds (minimum 60). To never stop, specify 0