How to Summon a entity ?

Basic example: Summon a cow

/summon cow ~ ~ ~

Example: Summon a charged creeper

/summon creeper ~ ~ ~ {powered:1}
Minecart
id
bat
bee
blaze
cat
cave_spider
chicken
cod
cow
creeper
dolphin
donkey
drowned
egg
elder_guardian
ender_dragon
enderman
endermite
evoker
evoker_fangs
fox
ghast
giant
guardian
hoglin
horse
husk
illusioner
iron_golem
llama
magma_cube
mooshroom
mule
ocelot
panda
parrot
phantom
pig
piglin
piglin_brut
pillager
polar_bear
pufferfish
rabbit
ravager
salmon
sheep
shulker
silverfish
skeleton
slime
snow_golem
spider
squid
stray
strider
trader_llama
tropical_fish
turtle
vex
villager
vindicator
wandering_trader
witch
wither
wither_skeleton
wolf
zoglin
zombie
zombie_horse
zombie_villager
zombified_piglin
Projectil
id
arrow
ender_pearl
dragon_fireball
spectral_arrow
small_fireball
snowball
fireball
firework_rocket
trident
lightning_bolt
llama_spit
tnt
Minecart
id
minecart
chest_minecart
command_block_minecart
spawner_minecart
furnace_minecart
hopper_minecart
tnt_minecart
Not mob
id
armor_stand
boat
end_crystal
experience_bottle
experience_orb
eye_of_ender
falling_block
item
item_frame
leash_knot
painting
potion
shulker_bullet
wither_skull