{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50672",
    "entityType": "User",
    "nonce": "0xfc29f2631abfaaeed72b6ea9c4632395addf7666c914ee2c191a83677b284d35",
    "signature": "0x504c275ab452c880f65ded39a235568196d4fb30267cb8eb1d224eec6412e0d333f9fddbd995ad7b03ab0f8a81e0ae4c2c954684e3c5fc0c0881d2ff6024d8081c",
    "signer": "0x009aa7b49eAF9a76b4b0e1D3C0ef92ba4e8ECEa4",
    "userId": "350390967"
  }
}