{
  "manageEntity": {
    "action": "Save",
    "entityId": "544487345",
    "entityType": "Track",
    "nonce": "0x4c7f80876472c3527d6048118e1b08edda0bf3446efd18798ffc99ee914904ad",
    "signature": "0xa93c08f17c39c287e2e9a581f00b3cd273b4ac18355e543788944232ec7564070204bed50332cbf65ed127d02950a518649267b6bd1a5abd327a1e3d65d685f51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}