Extrinsic 174611-1

{
  "heartbeat": {
    "blockNumber": 174609,
    "sessionIndex": 2910,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x04448d1319bdb6e56aecb712ee6db4f8398f0ccbf01e3acdb187aaa74e3547549ae875f7d600b0067b4ba5c5759ae4e3a353ced7e26c490e077abcb4bc815e87"
}