How to select a particular element from json array
IF column is json:

 SELECT id 
  FROM notifications n
  WHERE json_array_elements(n.dest_user_id_arr-&gt;'users') = 83;


If column is jsonb: 

 SELECT id 
  FROM notifications n
  WHERE jsonb_array_elements(n.dest_user_id_arr-&gt;'users') = 83;