Extrinsic 19788-1

{
  "heartbeat": {
    "blockNumber": 19787,
    "sessionIndex": 329,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x5ac8b7622ce62cb7af955192b6dc9ca63a2b5b21fc94b6c5bd7999a5a56669354e0ab07f11133e8e78d147cbd64d2d9c601c9db4f39b77bdcbe84193b3b2fb86"
}