Extrinsic 16331-1

{
  "heartbeat": {
    "blockNumber": 16330,
    "sessionIndex": 272,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x40e59501a5d5a632ef2aa62b7dcf025203d40116635d4de24d7f64c4fc88b408338797106904014dd1fe07df23c0371a6b34a41905fb3a898acb7a12529e9e87"
}