Extrinsic 57608-1

{
  "heartbeat": {
    "blockNumber": 57607,
    "sessionIndex": 960,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8890814c5fd007ca3cb37696d38b99b3030944faf4cfd9587427688ffd0f08228744dfbc8f9aef325e678bf467890f1a3327f2c3e38e90a3daf5ce6c468b4c8d"
}