Extrinsic 732-1

{
  "heartbeat": {
    "blockNumber": 731,
    "sessionIndex": 12,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x2ad0aa859ef813bc243b9880b35e6e96f86c7c3dabc72ee7053112443cf9a75ef9cdeb11ca3f948209ffab47e832bd8751f2f067b28deca64859c648244ee38b"
}