{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "321401",
    "entityType": "User",
    "nonce": "0xe52b739af7b75fefabc284aafe7e164d6943429ea2cf579e933b2dc625022267",
    "signature": "0x3fb95d2fc8d95ff9effe80ae73e9d51b1b93d9e59b07ac3f7be0b564d8de655f31116534eb0f97e8c0f1bc77df61ddeeccd2240a9e7e48d5932b075284c6a9bc1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}