{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa71bd2ab20ff9a2748c9a1807324ecc99b9d1a81fa65796b91f905dcfb43d2e0",
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    "signer": "0xC91E8F6417E0917e94e1d216f619958D90E1479d",
    "userId": "72445624"
  }
}