Extrinsic 172476-1

{
  "heartbeat": {
    "blockNumber": 172474,
    "sessionIndex": 2874,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xdc8abe4059b3bb36496dad23c706ef422d0e6f0c913136679e7ee98612c5ae3bea5cf3fc19abd57f3c571a9339dd85c832424d4b6f491c89be830a8ffa24648c"
}