Can I store map value (not an entity) data in datascript.

Yes

How can I do this? @tonsky

Just store them :) make sure attribute is not indexed, not unique, and not multivalued

it's entity actually, is it?

I fetch some data from api, the data has some key that I use it as my schema.

If you don't mark attribute as ref type, datascript won't try to interpret it as an entity

Instead, it'll be treated as an opaque value

Got it, thank you, tonsky