Extrinsic 18165-1

{
  "heartbeat": {
    "blockNumber": 18163,
    "sessionIndex": 302,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xaced2d1b5281c9eaaa03c81a525fcb91732869387b04accdc024224474fb9f5d176c8013cb0968fe64a513823d4e41517d13235e92c792288239294f0615868e"
}