need help with one component string

How do I make the firework explode? 
I know there is the "minecraft:firework_explosion" component but it doesn't work in this situation so I think I have chosen the right one but idk why it won't work.
Command below <:that:1203058770737897534> 
give @p minecraft:phantom_spawn_egg[minecraft:fireworks={explosions:[{shape:"small_ball",colors:[I;3885176],fade_colors:[I;2238277],shape:"small_ball",colors:[I;7588608],fade_colors:[I;4489217]}]},minecraft:entity_data={Silent:1b,id:"minecraft:firework_rocket"},minecraft:custom_name='{"text":"Gunpowder Egg","italic":false}']