Extrinsic 28395-1

{
  "heartbeat": {
    "blockNumber": 28393,
    "sessionIndex": 473,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x482bb9b7331f8d21b626183d578dad76e70dffa5a1fc83595236ac73948d2f0c0f8873183b826b8d1b09925a266a0462438fd990b5c280b7475287f25c6b8d8d"
}