{
  "manageEntity": {
    "action": "Save",
    "entityId": "843961145",
    "entityType": "Track",
    "nonce": "0xe780e155e14a6d834343dccf08d6e23b259fd3fb3c293f0df429b730c26bd424",
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    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}