{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x9908ce0e21e72ed6ec6c88c8d7fdc40ee9a8d23b9c8f3362e4ae64cb08e81ae1",
    "signature": "0xc6e90868e3d639d8e6a9d218ac5d324ec4663687cc7f0442645b2c53eef3e325154ecf70a149205b686fc71bb9b544846e9c5ffd29f94ca7da5149eb7f4584ef1b",
    "signer": "0x4fADC28D15fC4B42A6ab378E5b6155d0b8F33aaA",
    "userId": "372589391"
  }
}