Wrong authentication:

CONNECTED
CLIENT > ["connect", 0, "client1", { token: "wrongToken" }]
SERVER < ["error", "wrong-credentials"]
DISCONNECTED

Correct synchronization:

CONNECTED
CLIENT > ["headers", { language: "pl" }]
CLIENT > ["connect", 0, "client1", 0, { token: "token" }]
SERVER < ["headers", { env: "development" }]
SERVER < ["connected", 0, "server", [1475316481050, 1475316482879]]

CLIENT > ["ping", 0]
SERVER < ["pong", 0]

CLIENT > ["headers", { language: "en" }]

SERVER < ["sync", 1, { type: 'a' }, { id: [59637, "client2", 0] }]
CLIENT > ["synced", 1]

CLIENT > ["ping", 1]
SERVER < ["pong", 1]
DISCONNECTED

CONNECTED
CLIENT > ["connect", 0, "client1", 1, { token: "token" }]
SERVER < ["connected", 0, "server", [1475316659892, 1475316660687]]
SERVER < ["sync", 2,
          { type: 'b' }, { id: [-18928, "client2", 0], time: -18928 }]
CLIENT > ["synced", 2]

Clients may hide some actions from each other, so added time could be different:

CONNECTED
CLIENT > ["connect", 0, "client1", 130, { token: "token" }]
SERVER < ["connected", 0, "server", [1475316168379, 1475316169987]]
SERVER < ["sync", 132,
          { type: 'a' }, { id: [-11687, "client2", 0], time: -11687 },
          { type: 'b' }, { id: [-22034, "client2", 1], time: -22034 }]
CLIENT > ["sync", 1,
          { type: 'c' }, { id: -1617, meta: -1617 }]
CLIENT > ["synced", 132]
SERVER < ["synced", 1]

CLINET > ["ping", 3]
SERVER < ["pong", 150]

CLIENT > ["sync", 4,
          { type: 'd' }, { id: 234257, time: 234257 }]
          { type: 'e' }, { id: [234257, 1], time: 234257 }]
SERVER < ["synced", 4]
DISCONNECTED