Add extrinsic record

extrinsic_record.json

@@ -0,0 +1,4 @@
+{
+  "extrinsic": "8246946-13",
+  "hotkey": "5EHw1tiSQ5yqemCfQNPoNNEfb6MAeJXTz1G3WViqb9jPr6fu"
+}