{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7e16687162365bb75a67226cfcc0dc8a78d652ed0398c42e42f23b3f474a88e8",
    "signature": "0xfef3daebce5eca83aca68716e6ae56a2fb343645f883faf6536d883213861dbf5d755f299b4fe8918a1618889d012f9cfe2c25418c22755380b3729d5918061a1b",
    "signer": "0xe270df85E91471A5f1F4592b9A906A913Ccd4973",
    "userId": "190303607"
  }
}