I found solution. Maybe it will be helpful for somebody.

I send message using ton-core js sdk:

const tempFilePath = './storage/saved2' // tempFile - file generated by daemon-cli

const payload = await fsPromise.readFile(tempFilePath, {encoding: 'base64'});
        
const payloadBase64 = Cell.fromBase64(payload)

await provider.internal(via, {
    value: "0.5",
    body: payloadBase64
});

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