{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338551",
    "entityType": "User",
    "nonce": "0x49853aee9547558d9e093cfa18ead4a339654ed1a6d5ea4a99afeca278a3acfc",
    "signature": "0x7b2c3ff23b9578edc863fb666a75ff8cb5b1fd68d6a3c7d16a901c88eca3b1d103e775531e742b57da75bb807a5cc5cd6eb55f74e344f55a3f9fb7cfdd712a4b1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}