{
  "manageEntity": {
    "action": "Save",
    "entityId": "1939729358",
    "entityType": "Track",
    "nonce": "0x4e3757a4a0eaecde20cb2ff02d753f99fabb9cfa6c7896380e3c2c41c4d4ac23",
    "signature": "0x58e702a47d2ae93157d564ff7eaaa12f5b215025eb919a22b855ac0fbc78e778259173bd45c1fdc6726b4145087e5dcfc3587de876ef809d31c2627297c59e081b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}