Extrinsic 4179-1

{
  "heartbeat": {
    "blockNumber": 4177,
    "sessionIndex": 69,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x10716dd8b2879d69574709664c5728a41e0a8c9a6a787f56960b3fa1d65e67119964e78fc28e18f85b41cc32dda372147b5f93e69c4371c316b823d20ae90889"
}