Extrinsic 13246-1

{
  "heartbeat": {
    "blockNumber": 13244,
    "sessionIndex": 220,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x462ac8fcdeeb572f17b22accc80f5ba75d5b1720fc1fc50dfc4995cc9b9eb67e436dd02e967a5f6ebf0934323fc26e6b92f43147959baf37850d8aaf81a2778a"
}