{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863746603",
    "entityType": "User",
    "nonce": "0xb187894fbd0a3b669549ab5e2080c8e8402b1807d0d15805b3a34fccc1961d5b",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}