{
  "manageEntity": {
    "action": "Save",
    "entityId": "459218",
    "entityType": "Track",
    "nonce": "0x6f98ba1e4d5c32ab2ae1c01b989d32c7c6105c45677382bcbbe23af372d62e23",
    "signature": "0xc82b45600791ad23104611fdc3abb841af4c9327e0edaae1aad5404038a283c73c1d130c5099171cade2e5814f1ea028b04d8fb85ed1e256c10579d4bf719c121c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}