{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "763473",
    "entityType": "User",
    "nonce": "0xc12081a3c5fed34969f673653b67e90292fd2b9a8b277295760065ad3a5cf3e1",
    "signature": "0x315da22d20e883c4650bad9bc9760ba61113ff14c66e898f6a87841195ea95101067b4c33d405ba631603b9da58a14f9bc30f54634a8865082e4d4b59e4e61071c",
    "signer": "0x1F9dC682fadBAc94c0Dd4ca2232a3f490704a737",
    "userId": "737872723"
  }
}