{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "444242968",
    "entityType": "User",
    "nonce": "0x75550e9c2d63f591b60feeceba48b41d6ebb7a4ad2c93c729e36f9726ff12df9",
    "signature": "0x235872785b559be14df64a7fc26aa9fd63f1db20f52b4d07ca67acbe340222d40683cc913a984340141d443c6b763c9bed987dce0a41853541f3a42c0a083d511b",
    "signer": "0xd489B786708CDd8661b152CFF27695dC12c8c0C9",
    "userId": "647391197"
  }
}