Extrinsic 3314-1

{
  "heartbeat": {
    "blockNumber": 3313,
    "sessionIndex": 55,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb2340a952e46bf74edccc4fa6c7e234063bcd5b7093146a97b9c9fafd67f1356a915cf0f8e59c8e4792c449cf0287f57ba0b0a4884ccc388c9af05de0c432f89"
}