Create extrinsic_record.json

extrinsic_record.json

@@ -0,0 +1,4 @@
+{
+  "extrinsic": "454764-5",
+  "hotkey": "5CJyABQv4QR4WN94iftae1XeWMJX8kVrUDzKn34E7iGvSgx4"
+}