{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3396",
    "entityType": "User",
    "nonce": "0x32b0631e983abbacb5c6afa9f30945469d7ec18a7f4552e4b8bd81ee680ca428",
    "signature": "0xe4090324ab4665a3ab67ff4509bb68fc13d85995ddf83a187c0b3398e3c520475e2c6030b1b9d6c260a53439abfbb665a6bfb10fd2360fa5780cc7fba8fc35681b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}