{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "299453",
    "entityType": "User",
    "nonce": "0x1d088742fff13560f899c2617642e744bb0349b5a3bcb779bf8b523f464dfc0e",
    "signature": "0x1ac5c34050256c8f429eb4fa69eccb633f015855798084bd89bd3db5d9c59fc5678a44cad8842aff536bb7339ef6b7295d7d08290c8001a2656dff7ea7b55be11c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}