Can't summon mannequin with model:slim if it has a value set under properties

Attempted to summon a mannequin with the following command in a command block: summon minecraft:mannequin ~ ~1 ~ {model:slim,Rotation:[135.0f, 0.0f],profile:{properties:[{name:"textures",value:"eyJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvZTNiOTAyYzRlMjFkN2QxMWQyYWQ1YmY0MThkNGQ1ZjVjODA3ODc1ZTBiOThlZjM3Y2U5ZTljZThiOWVlZTZmOCJ9fX0="}]},CustomName:"Mary"}

Command block executed command perfectly except it missed the “model:slim”

Attempted to do on another command block, still did not work