{
  "manageEntity": {
    "action": "Save",
    "entityId": "1669826788",
    "entityType": "Track",
    "nonce": "0x04d2e236acf004218ec43b6bcd257aa3ccb2be0bc0212441b919ffc5d275a5ef",
    "signature": "0x19432068dfc8aa8724ea516d4aea82c6463115780948639bc31974949bfc773262e6a34b4a9cf9f85c30f23cf3f647ddf79b6b03967cdb16b90f58ebcce5bcbb1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}