{
  "manageEntity": {
    "action": "Save",
    "entityId": "2051580909",
    "entityType": "Track",
    "nonce": "0x898c528fb4b55e1372aa20386b454e151ef64c47cac552502df5dfed665083ed",
    "signature": "0x3802c224dff7918a15bf40423776af2c8559452de5cbd9da9e6e3ab9c4f551142a220c63e09e8d97eb7e204118fa479ed32e31fd017f1ba9f4f3f444c651a64c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}