{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb274a5b376741b73c17c6902da0069a7cd49b85628f4bdb2a86ce36f0469fb98",
    "signature": "0xa6f65b1cbd2d94485395c45c0a35f758c21363a747e700e1df49cd6483728be45e69a78f6a505fe13827d5c218fe9673139b85efc1ca45304b524650f6b05b661c",
    "signer": "0xF60Ba02889b9b80A49B075D13532e2c14728dA09",
    "userId": "123709817"
  }
}