Extrinsic 524-1

{
  "heartbeat": {
    "blockNumber": 523,
    "sessionIndex": 8,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x00b7630460153cc0f8d11c58e60ccde89240082543efa639a41f937e1a3ab956382fe61806d4df8b6c919699d4c2ed82f8656f6e12693a98979a1d3f7d619280"
}