{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50514",
    "entityType": "User",
    "nonce": "0x9990c989b4b1a233e21c2cf5e4b9ac9334ebdc185fee3fe6aa2aa13a933cba4b",
    "signature": "0xe6e53817556dc6052bb3e19fa437020ea78cab39458033582d54c7a49874ec8913b7b0adeba734b2c60ab13bb657cc67903eab0bf545b83a48f9c629cf09ee751c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}