Extrinsic 174971-1

{
  "heartbeat": {
    "blockNumber": 174969,
    "sessionIndex": 2916,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x8883641ba0c2862dc40455d0ba76d2e9b738f2f9be5feb69717296b5b120e8779c34dcd25dd3567d137244f940b1d013eeac895b6c17135a9b5194e4db608280"
}