{
  "manageEntity": {
    "action": "Save",
    "entityId": "434708",
    "entityType": "Track",
    "nonce": "0x27882ea0f0b36e485fd32d406bd159de96cf3d935d8700863496617488cea7eb",
    "signature": "0x75228180652540642ef4e14205ca66f21b262b9cb909fba2856358e00d535e8e7b1b274962dc087aafd32f40d0d660c7816f10360937ca15268a4bb71e6a37561c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}