{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116807",
    "entityType": "Track",
    "nonce": "0x73af9b4fd2c844b3afeecdbf11062f19b398e879d6a339ae0516011c10d046a1",
    "signature": "0xc15d1a0c7557975f2c679118741a265f085c7687f030fccc46ebda6fcc89418b49a74b81787165de82fc128c84deaa8e72b096357b1f42e553389ac641dd44d31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}