{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "629759723",
    "entityType": "User",
    "nonce": "0x0f761be6656bcabb7913bd474ddaaeacb48d1de00233f508f18dcb61b8f7a001",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}