How to use NBT parameters when spawning mobs?

[tryce404]

The code below just spawns a sheep with a random color
Sheep = mc.spawnEntity(x,y,z,"sheep", "{Color:2}")

[Gedehamsen021]

It's possible spawn a custom firework?, with colors and explosion Format?

[Gedehamsen021]

on this version i got this error

invalid literal for int() with base 10