{
  "manageEntity": {
    "action": "Save",
    "entityId": "200882006",
    "entityType": "Track",
    "nonce": "0x8fe9877cf467851008eb8e3623986d18b788732348f056c24973fb3eed4021f1",
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    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}