Extrinsic 9459-2

{
  "heartbeat": {
    "blockNumber": 9457,
    "sessionIndex": 157,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x6251f5c649ab625af06b7a9dbb754903b3009a2d75a8812e777f9ee00f1c456d098d44d0a0485af79c6945ede488cb58a77abb4685459444d9b5d189449ac985"
}