BC endpint

I need to have created a endpoint in business central that can create a entry in "payment journal" in business central using a api endpoint. We have a tool called "simple data object" that can be used to create endpoint. - info about the tool can be found at https://www.hougaard.com/. We need to have a endpoint that can get and post a following i {
"@odata.etag": "W/\"JzE5OzQ3NDUzNzI1MzM5MzU4MTUzMTUxOzAwOyc=\"",
"id": "c3d71cd0-56d6-ef11-8eec-0022488a3048",
"journaltemplatename": "INDBETALIN",
"lineno_": 0,
"accounttype": "Customer",
"accounttypeTxt": "Customer",
"accountno_": "",
"postingdate": "2024-09-30",
"documenttype": "Payment",
"documenttypeTxt": "Payment",
"documentno_": "12471",
"description": "xxxxx",
"bal_accountno_": "1",
"amount": 500,
"billtopaytono_": "",
"appliestodoc_type": "_x0020_",
"appliestodoc_typeTxt": " ",
"appliestodoc_no_": "",
"duedate": "2024-09-30",
"appliestoid": "",
"journalbatchname": "xxxxx",
"bal_accounttype": "Bank_x0020_Account",
"bal_accounttypeTxt": "Bank Account",
"bal_gen_postingtype": "_x0020_",
"bal_gen_postingtypeTxt": " ",
"bal_gen_bus_postinggroup": "",
"documentdate": "2024-09-30",
"appliestoext_doc_no_": "",
"accountid": "xxxxx",
"customerid": "xxxx",
"appliestoinvoiceid": "xxxx",
"journalbatchid": "xxxxx",
"balanceaccountid": "xxxxxxx"
},, but it need to be a balance account that points to a bank account instead.

If you dont have experience with Business central dont bid - I am a skilled programmer and the first question I will ask you is about your experience.