{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703534824",
    "entityType": "Track",
    "nonce": "0x122fa0a52856ec07238f7b257d6cea770fa0e8d930742c4f0eacaa28d14cc1cd",
    "signature": "0x45b797a408fcf84e40a8003a64c411426b9d8f0f55ae6667fce836496c9536671cf6c79a1076d0effd71c6f93db9ee0a56147bec4254315ea7d48ee96d4bb4851c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}