Extrinsic 18068-1

{
  "heartbeat": {
    "blockNumber": 18067,
    "sessionIndex": 301,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x563164e4a7128943e19dc0d3224f046c92c09fd747078dccc9e3e1dfb2fcd92161f9cb44719212357010fe6843787658a255696979e60a9392c7137b1b27228e"
}