400 Bad Request Error while running a Rest API "update_line_items" from Oracle CPQ

Summary:

I'm getting the below error while trying to execute the REST API to update the Transaction Line Items for a Transaction in Oracle CPQ. I'm using the Rest API "update_line_Items" via POST method to do that.

End-point URL-

https://****/rest/v19/commerceDocumentsOraclecpqo_bmClone_2Transaction/54472880/actions/_update_line_items

Could you please help figure out the possible cause of the error? personally, I don't see any issue with the syntax of the payload.

Content (please ensure you mask any confidential information):

{
"Instance": "commerceDocumentsOraclecpqo_bmClone_2Transaction",
"o:errorDetails": [
{
"title": "Parameter links is invalid."
},
{
"title": "Parameter id is invalid.\nParameter currencyCode is invalid."