ItemFrameBlockEntity
Amount of item in slot.
Dealed damage, when it comes to item will be broken.
Typed identifier, such as "minecraft:stick".
Indexed slot, required in containers with more than one slots.
Picked up by entity, denies despawn it naturally.
Percent value between 0 and 1; everything just cool when elytra
drops with chance 0.01.
Rotation angle in degress between 0 and 315 (with in-game step 45).
Also changes comparator strength, triggers observers.
Block Entity will be saved without instantiating new one when transporting (via pistons, commands, etc.).