Caution This is another quickly thrown together project that may have unintended results, and a perhaps more reliable program could be put together in Python in half the lines & a quarter the time. But it was to be a learning experience!
In work a couple of weeks ago I came upon a task that I thought could be made easier by having a JSON file to parse instead of a csv file, and I had a hankering to write some Go after been stuck on Python projects for months. So I found a project that had the framework that I liked, and I decided to fork it and expand the functionality. Check the README for more information.