Having some issues

I am trying to convert these into the new NBT format, but am unsure how to.
execute as @e[type=armor_stand,tag=big,tag=falling,limit=1] at @s run summon armor_stand ~ ~2 ~ {Invisible:1b,Invulnerable:1b,Marker:1b,ArmorItems:[{},{},{},{id:"carrot_on_a_stick",Count:1b,tag:{CustomModelData:18}}],HandItems:[{},{}],Tags:["item"]}

execute as @e[type=armor_stand,tag=regular,tag=falling,limit=1] at @s run summon armor_stand ~ ~2 ~ {Invisible:1b,Invulnerable:1b,Marker:1b,ArmorItems:[{},{},{},{id:"carrot_on_a_stick",Count:1b,tag:{CustomModelData:19}}],HandItems:[{},{}],Tags:["item"]}

execute as @e[type=armor_stand,tag=scarecrow,tag=falling,limit=1] at @s run summon armor_stand ~ ~2 ~ {Invisible:1b,Invulnerable:1b,Marker:1b,ArmorItems:[{},{},{},{id:"carrot_on_a_stick",Count:1b,tag:{CustomModelData:17}}],HandItems:[{},{}],Tags:["item"]}