Extrinsic 28426-1

{
  "heartbeat": {
    "blockNumber": 28425,
    "sessionIndex": 473,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe4344c9fd81e096d3f09bda67e143b08258ba75df5e2197165933e8f0c45a71bb6f5629cd20d3dcdd6b03f5b49b7d2a902f1754ddf325992c6bb70aec1d2468d"
}