Modify large JSON file

I have a very large json file. It contains geocoded data for all the postal zip codes in the united states. I need a subset of this file. The file is publicly available on Github: [login to view URL] The subset I need is the geographic data for all zip codes located in Massachusets and all zip codes located in New Hampshire. Those lists are here: [login to view URL] [login to view URL] Your final delivery is a json file with all the geographic data for Massachusetts and New Hampshire. The file should not become corrupted or otherwise unusuable - just remove the unwanted data leaving Massachusetts and New Hampshire. I am uploading the data to [login to view URL]