Extrinsic 28525-1

{
  "heartbeat": {
    "blockNumber": 28523,
    "sessionIndex": 475,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xe2c8095f61af3c3b56d8b7d4196071af3ac78d8f0115f6b11554f70a8c83685756f103a783beca551ee20b12d86c65c32bd48ee92c9117c8ac03c6ee34f75381"
}