event: open
data: {"id":"V89FeEvS1sKK","time":1791440372,"event":"open","topic":"6e98e383-36f7-4d50-aef3-b0f65b4c4f89"}

event: keepalive
data: {"id":"njQ3eY9toNfB","time":1791440417,"event":"keepalive","topic":"6e98e383-36f7-4d50-aef3-b0f65b4c4f89"}