Add extrinsic_record.json

extrinsic_record.json

@@ -0,0 +1,4 @@
+{
+  "hotkey": "5FEQRoJfkgePQn4E6sMBUPJSebtatou7nhPDuKMcpSp9Y8U8",
+  "extrinsic": "7739649-44"
+}