/summon FallingSand ~ ~1 ~ {Time:1,Tile:54,Date:0,Motion:[0.0,0.0,0.0],Items:[{id:skull,Count:1,Slot:2b}]}

我设置一个箱子落沙掉下来，但是物品没有啊，应该是什么函数呢？

/summon FallingSand ~ ~1 ~ {Time:1,Tile:54,Date:0,Motion:[0.0,0.0,0.0],TileEntityData:{Items:[{id:skull,Count:1,Slot:2b}]}}