Extrinsic 178270-1

{
  "heartbeat": {
    "blockNumber": 178268,
    "sessionIndex": 2971,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc2a459aec59e143e762a6fb9d4010f7baf5575caa85eeae7b1ca50eb65e69b4218d1bb280d887001b480cb09f9bd42e2576b5ab515ef29db39522d636df6d98b"
}