Extrinsic 175455-1

{
  "heartbeat": {
    "blockNumber": 175453,
    "sessionIndex": 2924,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6aa2ebfaa5aea5b96d60156f1bcef6d149c639556b09691dc66e9a2d605a1443564f15de0f2526c8f7eb8e40672801d9e89c07fa8809161558a37694f9e1d28b"
}