{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "385517",
    "entityType": "User",
    "nonce": "0x3a88498f5045b34445da8f01728c48cf74960635963d6ddf1e629077e1ee3d93",
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    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}