{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "722764767",
    "entityType": "User",
    "nonce": "0x389033f9221dad93fb338f5a83418ff8e8b0d8e0ff402a1e41d65e29209e8f99",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}