{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962373660",
    "entityType": "Track",
    "nonce": "0xfc87198fdc99659cb0254b9df08023585c55b3b756834ec0be36db9f3844d5b1",
    "signature": "0x7d78a7f8a3144215a888ef47868e6d82b068d3127e88e43013f2bc9d85fb10a06c564ce684664d9ce706283a18e22c58b13dfdb9ab1480fb05b7dd44fc8a344f1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}