Extrinsic 172724-1

{
  "heartbeat": {
    "blockNumber": 172722,
    "sessionIndex": 2878,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xae5c3ded36e98568c2ff8f8ddb40cd7d47b82f4e77fbd2d47836337db96ae02f94f87a09c5a00cca87d63d4507abc4e41d50f176cf917b25030231a7e6109f81"
}