How to define multiple allowed types when one of them is array of hash?

Currently I got an endpoint with params like this:

params do
  requires :content, types: [String, Hash]
end

When content can be array of hash also ([{"type": "paragraph", "children": [{"text": "test"}]}]), how are we gonna define it?

params do
  requires :content, types: [String, Hash, Array[Hash]]
end

with the code above, params[:content] will be

#<Hashie::Mash #<Hashie::Mash children=#<Hashie::Array [#<Hashie::Mash text="test">]>

which I don't think is correct? It looks like a hash of array. My expectation is params[:content] will be this:

[#<Hashie::Mash children=[#<Hashie::Mash text="test">] type="paragraph">]

because with that I can store params[:content] directly to a JSON column in the DB.

The issue names no files, tests, or entry points; start by locating Grape's parameter handling for the types: option and its conversion of array-of-hash values. Done means determining whether the requested declaration preserves the expected array of Hashie::Mash objects for JSON storage, and documenting or correcting that behavior.