Creating and updating list by js

Hello,

I work on a web application (JSSP) that is supposed to allows users to create their own recipient lists.

Historically these lists were generated by a workflow and the activity update/create list, so i have already plenty of list (type list).

But today i need to create, purge, fill these lists through js code.

Unfortunally i didn't found how to do it.

I am able to create group and add recipient in it but it's not the same story for list.

Also i can create a group of list type but the table (ex grp100000) is not created in database like list activity does, so i cannot fill it with my recipients.

Does anyone has an idea about how to proceed ?

Thanks a lot.