Create new item with column_values

Im trying to create a new item to my board but for some reason im getting status code 500 :frowning:

i tried to put both string and json formatsā€¦

    JSONObject jsonObject = new JSONObject();
    jsonObject.put("text5", "My test");

    String query = ("mutation{ create_item(" +
            "board_id:" + GD_SOURCES + ", group_id:" + backlog_group + ", item_name: \"new item noy test automation2\", column_values:" + jsonObject +  " ) { id}}");

when removing the column_values: jsonObject it works fine
but i need to create an item with column values :confused: