List all devices within geographic bounding box

List all devices with last known coordinates within the geographic bounding box described by top_left_coordinate and bottom_right_coordinate. The top left coordinate is expected to be the northwestern-most coordinate. A coordinate must be a valid WSG84 compatible latitude longitude pair in the form <latitude>,<longitude>. Valid latitudes and longitudes are parsable from the strings as floating point values, and are between -90 and 90 for latitudes and -180 and 180 for longitudes.