{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834641839",
    "entityType": "Track",
    "nonce": "0x7bc421e6b7b8da475e6b0ab55c9df0ca55e75923742b70ef975931958b836d0c",
    "signature": "0x83a2c89b53b5a9919221400a7faa3683b2de09a136b810b91ef2dfc3b979f6070a969481642ecbae7b71b44ce0a92f5ed694f7baff83e87e28cb05815272abbf1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}