{
  "manageEntity": {
    "action": "Save",
    "entityId": "385010",
    "entityType": "Track",
    "nonce": "0x24829e16e6d4b0f24b23783bd974e414fc9b40bc0468f33fd0a508801e910519",
    "signature": "0x654c2eae8a45e78692c723e5f60f5c916d05a042c385eec844f4a7e687aabf585f6696647798f0852cacca9ce6318ccb42c74f15d0dcccbcb424b1eac8aa325f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}