{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "356137",
    "entityType": "User",
    "nonce": "0x1ffa6df5f6f75eb71b41525419b9b1093445bfcb1f569c0c1d1054272de39911",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}