Extrinsic 12341-1

{
  "heartbeat": {
    "blockNumber": 12339,
    "sessionIndex": 205,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5a20386ee1dbfbf1e1be514339db92e1fb1ee1f7c6cab9ffa92e85e74053ab0ad4bcb9a581fbafcb6f27c716b3c7e8689f99662f561c2f6fa12fcfcbd70f678d"
}