{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390576",
    "entityType": "User",
    "nonce": "0xdd83c611e9e6278e28fac944f4287205a8fc2877876c241e4c30faa1d7fa5bd8",
    "signature": "0x50b14133a521ddd6ec57e1d7fdb12c582a673fe529be48a4c548ba04f16598ed0901c41c2a907084afaedcd48f6da4b0b7ef2a41cc08f8302f38ecd6ffde7da91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}