Extrinsic 19930-1

{
  "heartbeat": {
    "blockNumber": 19928,
    "sessionIndex": 332,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xdefea93fc57c49f10ce5ec3421ba1c192d5e9e766a7ab18c0c31e3c0579c296dd632457d9ba61837dcc2abdaccb997024ea0d5cc34d1e675ede20e81832bf58c"
}