rule editor only allows strings for Test conditions
Test conditions can be lists and strings, but the rule editor only allows strings.
An example list test is:
Test: [0, 1, 1, 1]
which checks whether the first (0) byte of the notification is 1.
See the rule documentation for more information, but the list can have either three or four members, each an integer. The first two select several bytes (0-origin addressing), the third and fourth provide a range, and the third alone is a bit mask.