How to use Array in Array of Json

Dear Friends,
My function definition is as:

CREATE OR REPLACE FUNCTION schema1.samplefun1(
vin_comp_cd smallint,
vin_div_cd smallint,
vin_loc_cd smallint[],
vin_bt_cd integer[],
)

Here instead of passing parameter I want to just send a single i/p in
Json[].

My problem is how to pass array in Json[] variable. And how to use in code.

Thanking You!
Monalee
Database Lead Engineer.