query(e, 'nbt')
Syntax
query(entity, 'nbt', path)
Returns full NBT of the entity. If path is specified, it fetches only the
portion of the NBT that corresponds to the path. For specification of path
attribute, consult vanilla /data get entity command.
Note that calls to nbt are considerably more expensive comparing to other
calls in Minecraft API, and should only be used when there is no other option.
Returned value is of type nbt, which can be further manipulated with nbt type
objects via get, put, has, delete, so try to use API calls first for that.