{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "640566478",
    "entityType": "User",
    "nonce": "0x65754182a216ed082b3626d1556dfdd96ef1c7ed74fe612375aa552e6e434160",
    "signature": "0x9b7b742d1d386a1fa1e33fd58690686b314f219270e73a49258f6f20f9bb57437bc86026d23be4a59e79c4b74b5f23f6c8414cfe1f29baea9c590b1399b5d21d1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}