Extrinsic 17493-1

{
  "heartbeat": {
    "blockNumber": 17492,
    "sessionIndex": 291,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8419b97fc377aac0832db341e3832de909268293217a33fab694715fcc8ed6554846b6920d4a8e9c8c8be64f49f79324bd2863e01c1e654788050fafd31bde83"
}