Op Code	Tx/Rx (Client)	Short Description	Example	Value
0	Rx	Initial connect payload		{ op: 0, d: { heartbeat_interval: 30000 (interval time in millis) } }
1	Tx	Send Heartbeat	{ op: 1 }	{ op: 1 }
2	Rx	Heartbeat ACK		{ op: 2 }
3	Tx	Send Message	{ op: 3, d: { message: "Hello!" } }	Refer to Op Code 4
4	Rx	Recieve Message		{ op: 4, d: { message: "Hello!", sender: "John Doe" } }
5	Rx	Update Client List		{ op: 5, d: { client_list: [ { pid: "#PID<0.0.0>", nickname: "John Doe" } ] } }
6	Tx	Set Nickname	{ op: 6, d: { nickname: "John Doe" } }	Refer to OP Code 7
7	Rx	Update Nickname		{ op: 7, d: { pid: "#PID<0.0.0>", nickname: "John Doe" } }