My silverfish aint silverfishing

so i have this command right here /summon silverfish ~ ~ ~ {CustomName:'[{"text":"Kornik","color":"gray"}]',Health:32,active_effects:[{id:speed,duration:9999,amplifier:2,show_particles:1b}],attributes:[{id:max_health,base:32f}]} i want it to have speed and more health but it just spawns with default health and only the effect particles are showing