{
  "manageEntity": {
    "action": "Save",
    "entityId": "696846270",
    "entityType": "Track",
    "nonce": "0x5c8fe71e70fa94034ad9a6661e870be977c108ed91d2b91e543da19e76375c15",
    "signature": "0xb53d2a668a9268ec214673fdf03208cd131be6f96b76dae7f4f77193ee17edb17d4f07da74601975d2094a4e49677cea607c4d3e118cbe84224959e43ef1b0151b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}