In btsync/BitTorrent Sync, how can I add multiple folders and secrets to the sync.conf file?

In btsync/BitTorrent Sync, how can I add multiple folders and secrets to
the sync.conf file?

In sync.conf, it appears that only the first set of "secret" and "dir"
values is available for remote syncs, although "secret" values that appear
subsequently in the JSON file aren't seen by the remote clients as
invalid.
I'ved tried entering "shared_folders": [{"secret": "secret1", "dir":
"/dirpath1"},{"secret": "secret2", "dir": "/dirpath2"}] as the notation,
as well as "shared_folders": [{"secret": "secret1", "dir":
"/dirpath1","secret": "secret2", "dir": "/dirpath2"}], but the first
example results in only the first share being synced, while the second
example seems to result in no shares being synced. Any suggestions?
Thanks!