How do I use nvim_echo?

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If I use function from here https://github.com/neovim/neovim/issues/13672#issuecomment-973245328 then it prints like this:

table: 0x7f13065660f8 false table: 0x7f13067cac00                                                                                                                                                                                              

Is there a way around it?

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I used this in the end and I couldn't find a way to do this with your plugin (probably not valid lua):

vim.api.nvim_echo({{"text", "DiffAdd"}}, false, {})