Special characters XML in the RestAPI commands

Special characters XML in the RestAPI commands

How can I use special characters XML (&,?, <,>, "...) in the RestAPI command parameters. When I pass in the Description field, for example "&blablabla", I get the error" Error when performing - ADD_REQUEST - XML document structures must start and end within the same entity". I tried to replace & with &amp; but it did not help.

P.S.
Sorry for my English. I use the Google translator.

P.S.

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