Extrinsic 174623-1

{
  "heartbeat": {
    "blockNumber": 174622,
    "sessionIndex": 2910,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xf4c786e8d59a1cd85fba5fd2d3eeefe45b92eb312f107af639939cf920f7c0287da65cab1c42aaf4d20919eae856d14a655b29f62a9ce214335905d7c1fe6688"
}