{
  "manageEntity": {
    "action": "Save",
    "entityId": "1712143355",
    "entityType": "Track",
    "nonce": "0x769ad25d37b6c16c7262cabdd3699d3889f42689952e13b7827f25f5eaf36547",
    "signature": "0xd9a03fa28296eded0b65c2f2faf96634b8b4f619dccc6de4683f78e96a71842231f5e97622284ea91d7d38f95df1be045d7affc5a8315245239e0b33c355e06e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}