Create extrinsic_record.json

extrinsic_record.json

@@ -0,0 +1,4 @@
+{
+  "extrinsic": "454877-5",
+  "hotkey": "5EJVf1W4PCQMJZwvWwofNLq2q8qx3HiWSfjqoerCFdqMg1UD"
+}