Extrinsic 28306-1

{
  "heartbeat": {
    "blockNumber": 28304,
    "sessionIndex": 471,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xfca6c0e76da3a7281fcb0d6f2acacf86bff94e14abd091ab27b2f53f72c52b031b08027cb1c2963d0c0a233b96b4608ee2d60be0ba425307f266fe27eb63f68d"
}