{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "330245235",
    "entityType": "User",
    "nonce": "0x2c88eafe1b657aec56c5a905f3aa7b6a892b9c0177febb4cfa0fa8fc90c9f27f",
    "signature": "0x2b925b0d9b49a37613d5217322a4cfa8b5c82f9bc82816097e35e22be6600ce43bc1a0af2e5e598e6b0cc354fc24cfc0e2767cc2d28dcde115e710216d1010731c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}