Extrinsic 4054-1

{
  "heartbeat": {
    "blockNumber": 4053,
    "sessionIndex": 67,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xaee06c7bb477e82641278f305e262fa66031b21348967392f4fc162950357213bf56027d5bb44bb439509d624dc03dc47f0e141600a8660651c3110777eb6887"
}