{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4541",
    "entityType": "User",
    "nonce": "0xeed50e01c152a2c2461f2b986a6ee019151793972e9dc78e64ab9c714d48fd5e",
    "signature": "0x59e8a1b823aa69bd8cfd7ef1d8e0fd17ab6ed67cb5779f9d8ffa67b615a023fd471586bf0478565947f8e711765dba35e1d9477ef90de329ca8c80e0fbb6ebda1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}