Extrinsic 2263-1

{
  "heartbeat": {
    "blockNumber": 2261,
    "sessionIndex": 37,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x76535195abd11134873b3f941d670f7cc8cf5efe6cee1b16171ae8d545f1c826bac8f4409b8a5563c90d8fc8a15c968a27ceb87625a5c6b41e02171330fe288c"
}