{
  "manageEntity": {
    "action": "Save",
    "entityId": "652120878",
    "entityType": "Track",
    "nonce": "0x6c265750cdca2bd58ac033fb5745e1bb4dd46f64254fe429d299736c9f1df14b",
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    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}