Extrinsic 6456-1

{
  "heartbeat": {
    "blockNumber": 6454,
    "sessionIndex": 107,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x6ea39042c031e44622bfb15696dfefb3def244838f524c620037850b1ec3987cdd40b3774e120f4f33cea83771c4534d9a4a4d44d142ef1315d61964b303a68b"
}