Extrinsic 172778-1

{
  "heartbeat": {
    "blockNumber": 172777,
    "sessionIndex": 2879,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xd25cc2ab1add96ebe1fb7ce359ac612e6d5dc9fecff34dd556ac28d19465792020a77ff59778f3baabc2fa651dfa38762b64a4a1730d5098fde213755767d98f"
}