If Logux sends { type: 'logux/susbcribe', channel: 'unknown' }, Rails will answer:
Write to Logux response: ["unknownChannel","1554484116313 380:R7BNGAP5:Pjoz3bdE 0"]
Write to Logux response: ]
But Logux wait for [["unknownChannel", …]], array in array.
/cc @dsalahutdinov