Extrinsic 19040-1

{
  "heartbeat": {
    "blockNumber": 19038,
    "sessionIndex": 317,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x101c1981f6d48b61e3ca23c01341d9fdd7e142c3677427b628276fc82aba082b973bacd1227a1b52847a24eb1957d51f03eef27c96a4b7e1bf7a17982fad5583"
}