{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1640466",
    "entityType": "User",
    "nonce": "0x165998b7bc54f8ac4f7e5d7fe6ccc796cc4f0194576c632a636a5a616421d39c",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}