Hello @Fahad Rehman,
Check out https://www.wowza.com/docs/wowza-streaming-engine-rest-api for a full overview of the REST API capabilities.
If you want to enable nDVR when you create a new application, you would POST to
If you want to enable nDVR on an existing application, you would use the same URL, but with the PUT method. Send a JSON object as POST / PUT data, where the JSON contains a “dvrConfig” property that is a child object
saveFieldList (array[string], optional)
Use the Swagger API reference for a better overview