when i try to summon a command block that has a summon command for another command block in it it will say:

expected '}' at position 241: ...te:

/summon falling_block ~2 ~ ~ {BlockState:{Name:"minecraft:redstone_block",Time:1,Passengers:[{id:"minecraft:falling_block",BlockState:

,TileEntityData:{Command:"/summon falling_block ~2 ~ ~ {BlockState:

,Time:1}"},Time:1}]}

it's weird that the first command block cares for an optional thing in a summoned object,
if you made a typo in the summoned command blocks command, it sould still be summoned.

because it's just text that should be included in the block