{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123497",
    "entityType": "User",
    "nonce": "0x44e35c386ba784eb7aa20238540dc7cb40f507f31229c548d2420631f445f7cd",
    "signature": "0xbc17d01650818de670f7756d8cf256cf1d9e595cc8c4a9572cf39ac5b8b127862f4990a1ff73560aa24d6d5b2b716822c1d8f7377807c7732026f1847a0e19901b",
    "signer": "0xC965eCf215DC75172bD11e8E1dbE76EDd838886e",
    "userId": "260849"
  }
}