{
  "manageEntity": {
    "action": "Save",
    "entityId": "195847115",
    "entityType": "Track",
    "nonce": "0x70f53273c2e597979adbedffd7e27bf7608637240e4fc1220f89b817a9d21f56",
    "signature": "0x912b8f07a868305a2a7859a5ffddfe0f0069c16b1309671be673dd4e180b1a1473bc174d998789b73051828d09674cf5290cc23113de52ab8bef09e560faee3b1c",
    "signer": "0x48a006fC89FEf065AAB7A5769519625870833CC6",
    "userId": "128172"
  }
}