Extrinsic 28608-1

{
  "heartbeat": {
    "blockNumber": 28607,
    "sessionIndex": 476,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x02f0700cd86f1f829f7cf9a5008dbfde13ad01d1e883ae4276bb3249f9bc396ae62215614a2d643bb5ce02b442e41f4dbb4471172fd83a63f0b535f4b62aa08f"
}