# BlobAssetChange

> Header for a changed blob asset.

## Definition

* **Type:** Struct
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public struct BlobAssetChange
```

## Fields

| Value                                                                              | Description                                                                                                                                                   |
| ---------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Hash](/engine/7000.0/script-reference/unity/entities/blobassetchange/hash.md)     | The content hash for this blob asset.                                                                                                                         |
| [Length](/engine/7000.0/script-reference/unity/entities/blobassetchange/length.md) | Byte length of this blob asset in the [EntityChangeSet.BlobAssetData](/engine/7000.0/script-reference/unity/entities/entitychangeset/blobassetdata.md) array. |