{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "373173",
    "entityType": "User",
    "nonce": "0xb74c7ea877e5df3e70ee731ab03935679d2e7886526248d51bc84b6686efdb79",
    "signature": "0x548a4bffa7f5f671c85e3eb65c2650950705122315f5831ce8c22f4a1092b322239d9d1b434eaedc3f98fe48635bbf0f36fda1dafe5c1be4d5dc6e2c3784d3751c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}