{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "904559297",
    "entityType": "User",
    "nonce": "0xa8b672e8d34e2ce3d193014e36cc5001ee906e2f9132fc6f52af7423e4adb155",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}