Extrinsic 34721-1

{
  "heartbeat": {
    "blockNumber": 34719,
    "sessionIndex": 578,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xc627d7f954e453e2cfd1ff53b019fe80da4741d18ec739b643b9fc2968a1254dc47deef18bf57e5d054c5ef4235979155166457039e272b47205f5466eebbc80"
}