Extrinsic 64367-1

{
  "heartbeat": {
    "blockNumber": 64366,
    "sessionIndex": 1072,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x18d948f63e7c6ede7aa38eb83165feaaa6a790043afcc831d10b2d118b326c2e8b1a1265ce5ee266d8349ea97dd21dc1ab850063ca44e3cd45cce0ca8f55f28e"
}