{
  "manageEntity": {
    "action": "Save",
    "entityId": "51353",
    "entityType": "Track",
    "nonce": "0x0edc0416c8c14989c2b9e56f58e2cf42f000ffe07379f9f45c92341270973e37",
    "signature": "0xdc32d3633595ca6135058ed77b215f93cf00f006f7f1b07cafa3de8c7b87132d27f56801a051effe5c7ea2806d27b9a5bfd795b0f540f1c653b41d537b8409611b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}