I get byte[] from unitywebrequest.get . now how can i change byte[] to another like mesh or assetbundle?

typeconversion is a real mess.it always giving me error that byte[] cannot be converted into assetbundle or other type.(there are few exceptions like texture as they have methods to convert from byte[] but real problem is when i dont have that facility).actually i wanted assetbundle.manifest file from server but due to unitywebrequest.get() request it got converted into byte[] now i cannot convert it back to assetbundle.manifest