Extrinsic 19929-1

{
  "heartbeat": {
    "blockNumber": 19927,
    "sessionIndex": 332,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x1ef7f5bfdfc8e3795b92feb5c192fee419e10cce8e202352c6a42161f47ec10f33403b380b5cfd557f4a5be29874ea641056df7110d77e5e8503958248828189"
}