Extrinsic 14923-1

{
  "heartbeat": {
    "blockNumber": 14922,
    "sessionIndex": 248,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xc8a20576a199a7a1ee6d8ce9c5cda76abac7016b1d530534b2781e2ffa09a61b73336686e712d4358a89e7217cdd252041ca51dc013d431fd7e53285bd2abb80"
}