Entity: part1, part2, ...
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armor_stand: right, left, waist, base
banner: slate, stand, top
bat: head, head, right_wing, left_wing, outer_right_wing, outer_left_wing
blaze: head, stick1 ... stick12
boat: bottom, back, front, right, left, paddle_left, paddle_right, bottom_no_water
book: cover_right, cover_left, pages_right, pages_left, flipping_page_right, flipping_page_left, book_spine
cave_spider: head, neck, body, leg1 ... leg8
chest: lid, base, knob
chest_large: lid, base, knob
chicken: head, body, right_leg, left_leg, right_wing, left_wing, bill, chin
cow: head, body, leg1 ... leg4
creeper: head, armor, body, leg1 ... leg4
dragon: head, spine, jaw, body, rear_leg, front_leg, rear_leg_tip, front_leg_tip, rear_foot, front_foot, wing, wing_tip
ender_chest: lid, base, knob
end_crystal: cube, glass, base
end_crystal_no_base: cube, glass
enderman: head, headwear, body, left_arm, right_arm, left_leg, right_leg
endermite: body1 ... body4
ghast: body, tentacle1 ... tentacle9
guardian: body, eye, spine1 ... spine12, tail1 ... tail3
head_dragon: head, jaw
head_humanoid: head, head2
head_skeleton: head
horse: head, upper_mouth, lower_mouth, horse_left_ear, horse_right_ear, mule_left_ear, mule_right_ear, neck, horse_face_ropes, mane, body, tail_base, tail_middle, tail_tip, back_left_leg, back_left_shin, back_left_hoof, back_right_leg, back_right_shin, back_right_hoof, front_left_leg, front_left_shin, front_left_hoof, front_right_leg, front_right_shin, front_right_hoof, mule_left_chest, mule_right_chest, horse_saddle_bottom, horse_saddle_front, horse_saddle_back, horse_left_saddle_rope, horse_left_saddle_metal, horse_right_saddle_rope, horse_right_saddle_metal, horse_left_face_metal, horse_right_face_metal, horse_left_rein, horse_right_rein
iron_golem: head, body, left_arm, right_arm, left_leg, right_leg
lead_knot: knot
magma_cube: core, segment1 ... segment8
minecart: minecart
ocelot: back_left_leg, back_right_leg, front_left_leg, front_right_leg, tail, tail2, head, body
pig: head, body, leg1 ... leg4
zombie_pigman: head, headwear, body, left_arm, right_arm, left_leg, right_leg
polar_bear: head, body, leg1 ... leg4
rabbit: left_foot, right_foot, left_thigh, right_thigh, body, left_arm, right_arm, head, right_ear, left_ear, tail, nose
sheep: head, body, leg1 ... leg4
sheep_wool: head, body, leg1 ... leg4
shulker: head, base, lid
shulker_bullet: bullet
sign: board, stick
silverfish: body1 ... body7, wing1 ... wing3
skeleton: head, headwear, body, left_arm, right_arm, left_leg, right_leg
slime: body, left_eye, right_eye, mouth
snow_golem: body, body_bottom, head, left_hand, right_hand
spider: head, neck, body, leg1, ... leg8
squid: body, tentacle1 ... tentacle8
villager: head, body, arms, left_leg, right_leg, nose
witch: head, body, arms, left_leg, right_leg, nose, mole, hat
wither: body1 ... body3, head1 ... head3
wither_skull: head
wolf: head, body, leg1 ... leg4
zombie: head, headwear, body, left_arm, right_arm, left_leg, right_leg