{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9ef9a1894886b85f913cccdff2e4a338fddc7ced622fa772a1b00aed0d0c78e8",
    "signature": "0xdc9cba781d1ea079928914d2ed3abce6e22f82dd9eee6f3f805046b9c5d4fb2909f796cba054b53573a74e9bf1202e9cdb9f55378272c83a148505cc19a9a1b31c",
    "signer": "0xD789D7A758b03Dd9Cb2a515Ba006C101d295420b",
    "userId": "752417560"
  }
}