Extrinsic 16179-2

{
  "heartbeat": {
    "blockNumber": 16178,
    "sessionIndex": 269,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xacbfed3eff26e7667f063aedbf7c93e92437dfc35963276c5098289826a59d5294634dd5d7907db0165b5be6dc26c48c057cf0d80107ef4a9449a1cc1e702d8e"
}