Specify attribute to return from Node JS function that generates a JSON object

Function getMyObject() returns a very long object called responseObject. I just want it to return a very specific attribute mydata which path is:

responseObject.data.GetNumber.GetId[1].a.dataset.mydata

How can I pass this "path" to getMyObject() so that it returns just mydata? The function should only return the attribute, the option to return the whole object then apply the "path" is not acceptable.

via Arturo