{
  "manageEntity": {
    "action": "Save",
    "entityId": "406335",
    "entityType": "Track",
    "nonce": "0x406a2ad2050ae241ac78008fbbd5e7a0d7a72f4ee94e8efc0b70b4a6a3aa87d6",
    "signature": "0xdb3b89a43cc6389bddbf5e2123df9b83aeba006dcc9c27ea5635f0385bce31982ffca19d94fdf76e7fca36d7251269ab2aba83a018ceb7e3c3df22c777e8f5991c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}