{
  "manageEntity": {
    "action": "Save",
    "entityId": "999972",
    "entityType": "Track",
    "nonce": "0xb0a81985d7b7598dd7af8e0fe662234666a384603b5a0c47b0ae4363f3828088",
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    "userId": "584186978"
  }
}