Comma separated list of sort expressions. Each sort expression is a property name optionally followed by a direction indicator asc (ascending) or desc (descending).
The first sort expression in the list defines the primary sort order, the second defines the secondary sort order, and so on. If a direction indicator is omitted the default direction is ascending.
Supported fields are action, appProto, clientMacaddr, customerId, destIp, destPort, destCity, destCountry, deviceIp, deviceModel, deviceName, deviceSerialNum, flowId, groupId, groupName, id, proto, signatureId, siteId, siteName, srcCity, srcCountry, srcIp, srcPort, strategy, timestamp, userName and userRole.