{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358837626",
    "entityType": "Track",
    "nonce": "0x8a60497c7c4295339a5ff96ca47f731eb46ad89a9b0e90f00b9073693359ce00",
    "signature": "0xd905d9439484ad21c3d1e8434938e050871b6d0c33909f0e1489da75d21485036258a99d5ac5deb5007c462cca3eb099d444cecbad7fbf9876cbb365eafe1b601b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}