Extrinsic 1060-1

{
  "heartbeat": {
    "blockNumber": 1059,
    "sessionIndex": 17,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xeeef1c5b20d84850673f0da591a9f9f173d939e1bfa84bc42480100ac13d425b6a3fa38c04f1c65788ab4bbbe269b533e092760b6d5050debbec7ab4ebf11b88"
}