{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4de30cb1b8b6958c5d2792856c64fb5df493056d9baa6530d313b76dffa402a6",
    "signature": "0xecbe6c65acdfeef62ea6b333383a9eea85b25c0e83c04c3513e558a7c608258b3baa8faa92e330db492fa19bd7bac077ca15614e6bf871cefa60d4480d1358291c",
    "signer": "0xb19c54D1dB784f8b4B584C6BC4eE3C40a7C47439",
    "userId": "547001496"
  }
}