{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbc5bc78d1cb1837bf57ef3ae6fcbcaa43fc6a6b1af18dea219c6d12c97a55c2b",
    "signature": "0x33728618504e0d2724618c13512d11c5678eb686240f37110f31e7113923f2d91f410a2924924e173dde9b6a490c3bfa7dc1b30fa525e44cabb0fbcf49e7b8eb1b",
    "signer": "0x15A0a536f48Ca082F3a891a1620152037566160b",
    "userId": "602323230"
  }
}