Polling HCM REST API for Updated/Created Phone Numbers without Person Number

Summary:

Since ATOM feed doesn't provide info on the HM/HC Changes, How Can I Get the list of all Phone Numbers Updated every X Minutes, so the downstram system can Update the system in near realtime

Content (please ensure you mask any confidential information):

How to poll HCM REST API for Phone Number changes, We don't have OIC

Version (include the version you are using, if applicable):

26B

Code Snippet (add any code snippets that support your topic, if applicable):