{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "421774111",
    "entityType": "User",
    "nonce": "0x2291c8a8725121c2a00c58846a3a2f364a4bf98f5a7c7df870cf3f2542313351",
    "signature": "0x70f3622faf385d871b05559a77dd7c1bde26d8b10b56166729c6c1fea09a5e7e4adcdac41fa6d1fa69164f156cd0e039eadbb4e71a98a2adb434b052b3b21cbe1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}