Extrinsic 9579-1

{
  "heartbeat": {
    "blockNumber": 9577,
    "sessionIndex": 159,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x86751af1f96b181ee9e3b4ec23406792e57dfbaef5d2ae6b3b05f6b4614c3d7ce993914413a81e6574f481bc0b8f21118d5add68dca9225897f03b0da0174c8b"
}