{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xee8cbdf70cb368de13fbac6a20c5230afac2540fe9271c5bb8c22d0ea1639386",
    "signature": "0xde56db88f7f26349db603a33c04efcbcaa0c0551ca8340e87c837ffc9d2f62c860998fddc6b23ea9171d890bc1c41f6b16ad54660de7b5158c2c2516edca20711b",
    "signer": "0xedc9db7ab00B53d022E93e8bB4c784365351319A",
    "userId": "517223430"
  }
}