@BraydenM timestamp is the number of milliseconds that have elapsed since January 1, 1970 at 00:00:00 GMT.
Note: In java it is in milliseconds. But in UNIX/Linux it is in seconds.
In python, you can convert to date, time by using the function, datetime.datetime.fromtimestamp(1582439517).
I believe it should be seconds. So you have to do, received timestamp / 1000 = in seconds
https://docs.python.org/3/library/datetime.html#datetime.date.fromtimestamp
I was unframiliar with what JSON were as I've never used java.
JSON is not a java specific. We can use it most of the languages. Examples in Python, https://docs.python.org/3/library/json.html