I want to use the MailChimp API 3.0:
http://developer.mailchimp.com/documentation/mailchimp/reference/lists/members/#
How do I set the query string parameter for the fields since_timestamp_opt, before_timestamp_opt, since_last_changed and before_last_changed?
Is it a timestamp, something like this: 2016-03-08 17:50:41 or something else?
Can somebody give me an example?
It is 2016-03-08 17:50:41 YYYY-MM-DD hh:mm:ss