The updated field contains 1588508735 How do I convert that to a date?
It's a epoch / Unix Timestamp (in seconds instead of milliseconds so you may need to multiply it by 1000).
So you'll have to see how that should be done in the coding language that you want (or let us know which language you're using).
Thank you, I am using Python
I found this: and I think that is for msec.
from datetime import datetime
date timestamp = datetime.fromtimestamp(1549401937)
print("Date =", timestamp)
timestamp2 = date.fromtimestamp(1549401937)
print("Date =", timestamp2)
It automatically determines seconds or milliseconds