Extrinsic 20718-1

{
  "heartbeat": {
    "blockNumber": 20716,
    "sessionIndex": 345,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xee4dbff2fc3d7d519212b5427cfa9baca96808db048dfd7093b4b449df1aad65c2f1aed37262c7ee357a2b5206a599916d44c269549cee14dca9d6d02b826787"
}