# UpdateImageHashMetadata

Updates the value of a key-value pair in the custom metadata of an image hash.

Type: synchronous

Parameter | Description | Required
--- | --- | ---
`database` | The name of the database that contains the image hash. | Yes
`identifier` | The identifier of the image hash to update. | Yes
`key` | The key of the key-value pair to update. | Yes
`newvalue` | The new value (maximum 254 bytes). | Yes

## Example

    /action=UpdateImageHashMetadata&database=ImageHashes
                                   &identifier=MyImage
                                   &key=importance
                                   &newvalue=low

## Response

    <autnresponse>
        <action>UPDATEIMAGEHASHMETADATA</action>
        <response>SUCCESS</response>
        <responsedata></responsedata>
    </autnresponse>

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