Great question — answering as the UphillTech team:
Not exactly a direct answer, but a possible work around. I found that sending through a right single quotation mark . So this ’ in place of the straight apostrophe ' Allowed my messages to go through. So sending content variables like { "1": "aaasdasd", "2": "people’s" } Seem crazy, yes, it does to me too. But without reasonable documentation on how to escape things, it's the best I could do.
Full answer by Jeff Richards: https://stackoverflow.stackexchange.com/a/79556328 (CC BY-SA 4.0).
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