{"database": "audit", "table": "detection_signals", "rows": [[16, "2026-05-21T06:59:36.631081Z", "anom_stat_new_actor", "warning", "klaviyo", "New actor seen: '01JK9878555F241M6T3BS64PM6' on source 'klaviyo:events:backfill' (store: klaviyo)", "{\"event_id\":9805868,\"actor\":\"01JK9878555F241M6T3BS64PM6\",\"source\":\"klaviyo:events:backfill\",\"store\":\"klaviyo\",\"first_seen\":\"2026-01-04T18:32:25+00:00\"}", "[9805868]", "new_actor:klaviyo:events:backfill:klaviyo:01JK9878555F241M6T3BS64PM6", "2026-05-26T22:50:43.845Z", null]], "columns": ["id", "fired_at", "rule_name", "severity", "store", "summary", "payload_json", "related_event_ids", "dedupe_key", "acknowledged_at", "acknowledged_by"], "primary_keys": ["id"], "primary_key_values": ["16"], "units": {}, "query_ms": 1.5533610712736845}