Extrinsic 3523-1

{
  "heartbeat": {
    "blockNumber": 3522,
    "sessionIndex": 58,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x5459246d457f4c11eb6e66361afa5ffb8019f723695df14699630a6ef8c95f01a9c919b1361211dc1c4e806a1b4f697b602daffaa0dec22db2f7d38364fa988a"
}