Extrinsic 28529-1

{
  "heartbeat": {
    "blockNumber": 28527,
    "sessionIndex": 475,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xe225cf7d27ac179887a089691ede4a80058bbf1eebdbeb04f604e52ff18d79412d5e42ff287e47a10954ee64a3394668a73d787c034b4b584f8e8a10acc85f8c"
}