{
  "manageEntity": {
    "action": "Save",
    "entityId": "1678541368",
    "entityType": "Track",
    "nonce": "0x05c8fc1ecd9b8030574309777cd4c87c35e6c569b9ce733ad0aaf20a9814c9f9",
    "signature": "0x0bb1994e37b11ebd3cd86d2899f36a97b75b825309eab505eb65f5eaea7fa0ae21551211b9a656b261c0fa686d0a3bd0fb9c8e46be323064afb3d67ef3eee1da1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}