Extrinsic 17135-1

{
  "heartbeat": {
    "blockNumber": 17134,
    "sessionIndex": 285,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x2cfd7a7afc43e44b287aa96a4f7d5182c275270d6163f362740c5fa81d360e743421cf7d19551b0f55b6156889adf7ac46d8c81e6c8ed027b9ba1d7d419f8985"
}