Bedrock Edition level format/Block entity format

=BlockActor=


 * The namespaced ID of this block entity.
 * : The X position of the block entity.
 * : The Y position of the block entity.
 * : The Z position of the block entity.
 * : True if this block entity is movable with piston.
 * : (Optional) The custom name of this block entity.

=Additional fields for block entity types=

banner

 * : The base color of the banner.
 * : The type of the block entity.
 * : List of all patterns applied to the banner.
 * : An individual pattern.
 * : The pattern id code. SeeBanner.
 * : The base color of the pattern. SeeBanner.

Beacon

 * : The primary effect selected, see Potion effects for IDs. Set to 0 when no effect is selected.
 * : The secondary effect selected, see Potion effects for IDs. Set to 0 when no effect is selected. When set without a primary effect, does nothing. When set to the same as the primary, the effect is given at level 2 (the normally available behavior for 5 effects). When set to a different value than the primary (normally only Regeneration), gives the effect at level 1.

Bed

 * : The data value that determines the color of the half-bed block. When a bed is broken, the color of the block entity at the bed's head becomes the color of the bed item when it drops. SeeBed.

Beehive

 * : True if new bees will be spawned.
 * : (Optional) Entities currently in the hive.
 * : An entity in the hive.
 * : The entity in the hive. Always.
 * : The time in ticks until the entity leave the beehive.
 * : The NBT data of the entity in the hive.
 * Actor

Bell

 * : True if it is ringing.
 * : Unknown.

Brewing stand

 * : The max fuel numder for the fuel bar.
 * : The number of ticks until the potions are finished.
 * : Remaining fuel for the brewing stand.
 * : List of items in brewing stand.
 * : An item in the brewing stand, including the slot tag.
 * : The slot the item is in.
 * ItemStackBase

Campfire

 * : How long each item has been cooking. is 1, 2, 3, and 4.
 * : (Optional) List of up to 4 items currently cooking. is 1, 2, 3, and 4.
 * ItemStackBase

Cauldron

 * : If the cauldron contains a potion, this tag stores the ID of that potion. If there is no potion stored, then this tag is set to -1.
 * : If the cauldron contains a potion, this tag stores the type of that potion. 0 is normal, 1 is splash, 2 is lingering. If there is no potion stored, then this tag is set to -1.
 * : (Optional) This tag exists only if the cauldron stores dyed water; stores a 32-bit ARGB encoded color.
 * : List of items in this container.
 * : An item, including the slot tag.
 * : The inventory slot the item is in.
 * ItemStackBase

Chalkboard

 * : The X postionn of its base.
 * : The Y postionn of its base.
 * : The Z postionn of its base.
 * : The size of this chalkboard.
 * : True if it is on ground.
 * : True if it is on locked.
 * : The Unique ID of its owner.
 * : The text on the chalkboard.

Chemistry tables

 * : (Optional) Unknown.
 * : (Optional) Unknown.
 * : (Optional) Unknown.

Chest

 * : (Optional) True if this chest is unpair with chest next to it.
 * : (Optional)
 * : (Optional) The X position of the chest paired with.
 * : (Optional) The X position of the chest paired with.
 * : Unknown.
 * RandomizableBlockActorContainerBase
 * : List of items in this container.
 * : An item, including the slot tag.
 * : The inventory slot the item is in.
 * ItemStackBase

Command block

 * : States whether or not the command block is powered by redstone or not.
 * : Allows to activate the command without the requirement of a redstone signal.
 * : (Optional)??
 * : Indicates whether a conditional command block had its condition met when last activated. True if not a conditional command block.
 * : Unknown.
 * : Unknown.
 * : Unknown.
 * BaseCommandBlock

Comparator

 * : Represents the strength of the analog signal output of this redstone comparator.

Conduit

 * : The Unique ID of the hostile mob the conduit is currently attacking.
 * : True if it is active.

Dispenser and droprer

 * RandomizableBlockActorContainerBase
 * : List of items in this container.
 * : An item, including the slot tag.
 * : The inventory slot the item is in.
 * ItemStackBase

Enchanting table

 * : (Optional) The name of this enchanting table.
 * : The rotation of the book.

Flower pot

 * : (Optional)

Furnace

 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase

Hopper

 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase

Item frame

 * ItemStackBase
 * ItemStackBase
 * ItemStackBase
 * ItemStackBase

Jukebox

 * : (Optional)
 * ItemStackBase

Lectern

 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)
 * ItemStackBase

Lodestone

 * : (Optional)

MobSpawner
BaseMobSpawner

Moving block

 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)
 * : (Optional)

Shulker box

 * Chest

Structure block


=Additional fields for block entity categories=

RandomizableBlockActorContainerBase

 * : (Optional)
 * : (Optional)