Want to generate data for my schema

CREATE TABLE IF NOT EXISTS user (
age text,
city text,
state text,
gender text,
userId text,
country text,
language text,
userName text,
projectId text,
additionalProperties map<text, text>,
userPreferences map<text, frozen<list>>,
PRIMARY KEY ((userId, projectId))
);

This is my table . All columns are i am able to generate data.
Particularly ‘userPreferences map<text, frozen<list>>’ this column .
I need to generate data for this column like
Ex: {‘languagePreferences’: [‘Telugu’, ‘Hindi’]} . I need like this. Please help me on this any one.
Thanks in advance

Check out this schema. This should get you started in the right direction.