Extrinsic 37541-1

{
  "heartbeat": {
    "blockNumber": 37539,
    "sessionIndex": 625,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xb447618abb3be766d234fe6df6e255fd0809059c849758edbab66dc5bd09af542f1fcea4e28fba922d05bd791fa490523f03ea26cfcfafbd1030170d5b3e1e84"
}