Tile Entities
If you want to add extra data to your block (more than what you can fit in the 4 bits of metadata) or you want to add some kind of logic to the block (i.e. it is a machine or other device) then you need a tile entity. In this chapter we show a few example tile entities.
More in-depth information on tile entities can be found at the official forge documentation: https://mcforge.readthedocs.io/en/latest/tileentities/tileentity/