{
  "manageEntity": {
    "action": "Save",
    "entityId": "523129",
    "entityType": "Track",
    "nonce": "0x63b9762af92dc52359e16b2c941305e855754209ef8005f4d5dc4a42a4955570",
    "signature": "0x7e624df2684c5dd69be17a2fb60e3b9c53453256fe3e37b44e2be9236a07b0aa1df59c9cbe9319b39ebbe7ea00702a05cc9edaeaaf1629636479f31ee3cba8c61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}