Extrinsic 28699-1

{
  "heartbeat": {
    "blockNumber": 28698,
    "sessionIndex": 478,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x92d7b25375b2d5f460dbeab47cedff01ae90d6b792f62a974a3326f44881764f4bfea8bb2eedf8e324fc27a27bead819cec7e5bccffb56288ec7168664cba68a"
}