minecraft:mob_spawner (minecraft:mob_spawner - 52:0) has a TileEntity
Full block state: minecraft:mob_spawner
Hardness: 5.0000, Explosion resistance: 5.0000, Material: ROCK
Block class: net.minecraft.block.BlockMobSpawner
IBlockState properties: <none>
TileEntity class: net.minecraft.tileentity.TileEntityMobSpawner

TileEntity NBT (from TileEntity#writeToNBT()):
TAG_Compound (10) ('')
{
    TAG_Short (2) ('MaxNearbyEntities'): 10
    TAG_Short (2) ('RequiredPlayerRange'): 48
    TAG_Short (2) ('SpawnCount'): 2
    TAG_Compound (10) ('SpawnData')
    {
        TAG_String (8) ('id'): "biomesoplenty:wasp"
    }
    TAG_Short (2) ('MaxSpawnDelay'): 250
    TAG_Short (2) ('Delay'): 36
    TAG_Int (3) ('x'): 275
    TAG_Int (3) ('y'): 59
    TAG_Compound (10) ('ForgeCaps')
    {
    }
    TAG_Int (3) ('z'): -347
    TAG_String (8) ('id'): "minecraft:mob_spawner"
    TAG_Short (2) ('SpawnRange'): 4
    TAG_Short (2) ('MinSpawnDelay'): 100
    TAG_List (9) ('SpawnPotentials') (1 entries of TAG_Compound (10))
    {
        TAG_Compound (10) ('')
        {
            TAG_Compound (10) ('Entity')
            {
                TAG_String (8) ('id'): "biomesoplenty:wasp"
            }
            TAG_Int (3) ('Weight'): 1
        }
    }
}
