Extrinsic 3937-1

{
  "heartbeat": {
    "blockNumber": 3935,
    "sessionIndex": 65,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf8c2493abf27daeca8e36e1cdcbfd890d64b2c84cc564d653bf679747515c21b5d3c84e7db3612c898e550a93f619eaa7a773af524191345f0a98f3a4e5d9f8c"
}