saving multiple names in a macro under a single namespace

the title is probably confusing, lemme elaborate. i'm trying to save values in a macro to then merge them with a summon command in the tags, but my issue is that when saving more than single value doing something like this data merge storage relics:projectile {effects:["1","2"]} the data saved results to be ["1","2"], while i'm trying to keep only the "1","2"