Extrinsic 8089-2

{
  "heartbeat": {
    "blockNumber": 8087,
    "sessionIndex": 134,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xa45bec03990e601c674679e14765bd1822283e21a9df96d9e2caf43d5602b52cb8b97fe67ffbbdba2b32c15b7416705f195ff489c3db06cf8454e7db5ad49786"
}