{
  "manageEntity": {
    "action": "Save",
    "entityId": "63010268",
    "entityType": "Track",
    "nonce": "0x78cbe35cc2e9f5edc0faae6672aa708bb501aacf72437a406df19b42f0d8e8e6",
    "signature": "0xef4450a412688982fa74ed42b3e5c76e62859bd12e13fe58b52c5c0ae4b7a4a522d1de92b1603c100efe4a55d92293900066e39550cd30b69796b10bd0f332031b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}