{
  "manageEntity": {
    "action": "Save",
    "entityId": "820425578",
    "entityType": "Track",
    "nonce": "0x2b674e8f58b3d3815b22b6203457671bdf16d422809bece572fbbdd0381b3838",
    "signature": "0x3bfcc38a6ea767de6a208d9ff1ab671836eaab1f1b1799bcb2593045055f66fd51d181ee32dcb8c362da81b7aa7fa6297c440fd720de2c2ed497358eec44e1fd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}