Extrinsic 6288-1

{
  "heartbeat": {
    "blockNumber": 6287,
    "sessionIndex": 104,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x20394125d2d58b2b26078ccb90bd9e91e007cd07ac089f00dce77d74d9b02709e1b6cfc2e94cb01b52009e1ccdc02b7e4515b4bec027415ad5cc9f1750d42e82"
}