Extrinsic 175688-1

{
  "heartbeat": {
    "blockNumber": 175686,
    "sessionIndex": 2928,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x96552fc00b78286364426cbcc79b10dc1891e1d4415dd372a1899633b1f2505b5fb9826c203915dc1e3599efe25a67410573342e5d4da3f6af424dd5781cbf8b"
}