{"trace_id":"example-trace","event_id":1,"pcap_index":0,"ts_ns":1736451234567890000,"direction":"c2s","flow":{"src_ip":"10.0.0.10","src_port":51012,"dst_ip":"10.0.0.20","dst_port":502},"expected":{"modbus":{"transaction_id":513,"unit_id":1,"function_code":3},"fields":{"starting_address":0,"quantity":2}}}