curl --request POST \
  --url https://api.paygentic.io/v0/orders/{orderId}/lineItems \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "quantity": "<string>",
  "listUnitPrice": "<string>",
  "unitPrice": "<string>",
  "totalPrice": "<string>",
  "itemId": "<string>",
  "description": "<string>",
  "discountUnitAmount": "<string>",
  "metadata": {},
  "termStartDate": "2023-11-07T05:31:56Z",
  "termEndDate": "2023-11-07T05:31:56Z"
}
'

{
  "id": "<string>",
  "object": "order_line_item",
  "orderId": "<string>",
  "quantity": "<string>",
  "listUnitPrice": "<string>",
  "discountUnitAmount": "<string>",
  "unitPrice": "<string>",
  "totalPrice": "<string>",
  "termStartDate": "2023-11-07T05:31:56Z",
  "termEndDate": "2023-11-07T05:31:56Z",
  "metadata": {},
  "createdAt": "2023-11-07T05:31:56Z",
  "updatedAt": "2023-11-07T05:31:56Z",
  "itemId": "<string>",
  "description": "<string>"
}