Extrinsic 16686-1

{
  "heartbeat": {
    "blockNumber": 16685,
    "sessionIndex": 278,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xe007ee4b873df9c9a5a505c5f04f0686c829d9994a5d9db4eec53c7d897e48288176d3df2a0e5afe60ffe46b8377a2eb98d3dece88a7584c6e778f9c1b596385"
}