I am trying to post data like below

{
            "ORG_ID": "81",
            "TRX_DATE": "30-JAN-2024",
            "TRX_NUMBER": "240006078",
            "ORDER_NUMBER": "4241020007471",
            "QUANTITY_ORDERED": "12",
            "QUANTITY_INVOICED": "18",
            "MAX(SALES_ORDER)": "2240100002376",
            "EXTENDED_AMOUNT": "        3,73,600.00",
            "sales_detail":[
                {
                    "item_id": 01,
                    "item_name":"box"
                }
            ]
        }

I want to post this data and want to pass it using syrefcursor.

while I am trying the below pl/sql code

DECLARE
     l_crusor SYS_REFCURSOR;


Begin

        l_cursor := :sales_detail;
        apex_json.open_object;
        apex_json.write('data',l_cursor);        
        apex_json.close_object;


    end;

getting 555 error, saying datatype is not correct.