Extrinsic 41318-1

{
  "heartbeat": {
    "blockNumber": 41317,
    "sessionIndex": 688,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x96720740f96cf88ce3892e1dbc0b99f2850cfa65bbbc6fe6d4e80344b7770a576e9de358a4202bdc239784fdea37f964a9e5aaffe562ea1a9e83daf58538eb81"
}