Animation

Packet ID	Direction
0x12	Both

This packet is sent by both the client and the server for swinging your arm (1) and leaving a bed (3), which is serverbound only. The client instead uses the Entity Action packet for when it leaves a bed.

Both

Field	Type	Description
Player ID	Integer	The ID of the player who did the animation
Animation	Byte	The type of animation. Can be 1 or 3

Example Packet

Field	Value
Player ID	1298
Animation	1