{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54498",
    "entityType": "User",
    "nonce": "0x0e7f6f1c6ffec14e1911f281c920b46791587f60484a2b2e1029387cf7c72f01",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}