{
  "manageEntity": {
    "action": "Save",
    "entityId": "63749",
    "entityType": "Track",
    "nonce": "0xeba9acf76eb7e66f3544d77d53cbef6505d75089edcde14efd8aba4a839a72bf",
    "signature": "0xb4487578d27ec7a038186c3d9e8e51b8fd99834e48fe566bb91b21a972c2cf2d6921331d9d367ccd4bf600c558338244655ea9aa3dd2e58c8e83301f8bb0258d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}