{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121537",
    "entityType": "User",
    "nonce": "0xc8d4ef868f2ded4fb9c838eed4792aa51a521fa44aab95b0d21373e8df236a82",
    "signature": "0x63b54d0c12a9c3e63f72a25edf07e1d53a5e6250033329838bd37d8f54b79b306c84bf2dc631b911c2a6c06789b606a21aee5db1199e8dffe2faf865c7cfa3a31b",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}