Extrinsic 17359-1

{
  "heartbeat": {
    "blockNumber": 17357,
    "sessionIndex": 289,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x2cc7a3ff34e59aae414b8684df45e7ada71b3406e3520f495b8a7716f25673150883a3db59f260d9c0515318bc1a9ae4b427af06f6c4e1339f78401a1db5ea8a"
}