{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x4ba1c74874df47901e996cd345d423dd62ba3d2c7f024cfa58bf053c02928a37",
    "signature": "0x77e586c0dcdcd40a1d2ae1bf8fd261a64dc2f0181e72768d5ed21a07f550789a3548635370907cd6cf8bde39a030bef1f8b6b7c4a379ba80198c3c97e94ef15d1b",
    "signer": "0x83d22deAd53BaAD0Fd2A640a06E20cbD008eF02e",
    "userId": "415523180"
  }
}