Extrinsic 28662-1

{
  "heartbeat": {
    "blockNumber": 28660,
    "sessionIndex": 477,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xc2e0756c2bac633458c43e6d759e1a43d5cfe0d40681b661cd242f471b8447722c5c10be4342299c6d2d20036de44f861b58462ae0e0e4e75278aa9af6cc688c"
}