{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "387491",
    "entityType": "User",
    "nonce": "0xe799e721bf55d8eb3b76513a5d2eba4622505e39ecec85f968a71dbd2a1d8ead",
    "signature": "0x5c6e5005aed4c6790912ce51e5221dc3231f0bd8834d398af06be2c030743b667e2f67edd5fe3642bdba18a9371a6b35569e422254575297b65a2b0be89fbdeb1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}