{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0x15917dde26676f682d5446f4a63370866f89dce9bbb043bb80ed9b8e9a2e4fc3",
    "signature": "0xe2158d9c402314c1f56f7230c46a93dfe144d4fb9fbdb6f60cfa5fb583ccd8ea4941e53543020bc407ae1ab057338a94b3f24018834acb9ec30c3b3a49644cba1b",
    "signer": "0x009aa7b49eAF9a76b4b0e1D3C0ef92ba4e8ECEa4",
    "userId": "350390967"
  }
}