{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0xb578955893d4b8b3362e8c1d0d133b5c68c253234add4f11600d543d623adaef",
    "signature": "0xc56ce1ff8ad63d2f4892a6fb224c3e48f872ab10957adbc2ee185942d713799e34437a5af11bc158458cf4f7fa9dba19dcc940ce7da170272f96b66ed252d4c11c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}