Extrinsic 3614-1

{
  "heartbeat": {
    "blockNumber": 3612,
    "sessionIndex": 60,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x64ede3cd20b6068a3935d88d01ca7325f26dcfc3072b69a2e6b79eeeb9e00c16c6b9dc792961fbc9f5879c179a82c25e1543b427c3939368911a87f8bd6ff280"
}