Extrinsic 16425-1

{
  "heartbeat": {
    "blockNumber": 16424,
    "sessionIndex": 273,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xd6d6c8c728e7aa28744ea254de036433f8cfe416fd18e456d647647605498f6115686bb4dbb46fad11cea00dc4e54c23cdb21e237f3afddddddce675bb42848c"
}