Extrinsic 562-1

{
  "heartbeat": {
    "blockNumber": 561,
    "sessionIndex": 9,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xdc56c04f77649c30418bd06c438dbbe2580a1687b5db82c906fa25fc428cb865a297f5d19870903cefeb2dd41130af5421f5f1abb34f5e2769ecf05db848dd88"
}