{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9f8da71e2235d789fe89928f38399f143c9a54fbf7abbe4dd3c516ad1fbeba1a",
    "signature": "0xe410392da2a6cf8637a2059c26ffef57c088cd3ee01a7beef0f138f7aec6a61239039395b66f0c1131e6708c5faab6f2bb86b9441c9b638c7530c9f111a6383b1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}