| "arg_set_id","flat_key","key","int_value","string_value" | |
| 1,"user_event.action","user_event.action","[NULL]","NewTab" | |
| 2,"legacy_ipc.class","legacy_ipc.class","[NULL]","AUTOMATION" | |
| 2,"legacy_ipc.line","legacy_ipc.line",10,"[NULL]" | |
| 3,"keyed_service.name","keyed_service.name","[NULL]","MediaRouter" | |
| 4,"latency_info.trace_id","latency_info.trace_id",7,"[NULL]" |