Extrinsic 3581-1

{
  "heartbeat": {
    "blockNumber": 3579,
    "sessionIndex": 59,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x2049d5511c3fc54b82ea63bb8f5110bf313b449bb1f139fb18c13d8b10325c73db75498785732018cc709c3872ea975d8313b186c52c14b5da74367d572a0883"
}