Hope everyone is doing good and getting ready for 2021!!
While testing your API’s its advised to write more re-usable and efficient test cases. One such practice can be: Try to use more Dynamic variables instead of passing the static ones. But of course wherever possible, and you can have the user defined functions where it will easy for the validation of the end results. I have explained one such example with a SOAP request in the below article.
Kindly read it, and try to implement the approach to your API Tests!!