{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "571769298",
    "entityType": "User",
    "nonce": "0x6f88529df025d6ca3813621af85aa0ce523404a3026fd73e9ee43652e545a932",
    "signature": "0xe453de722ac1f9b4733193069bc3a777e03344c6ed5b3af91e894eadc28648213212d1db57b880ea84c8eef03e5a8b4fe3581e98f63094259f1670b9ae7568471c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}