For readability, examples might be shown in literal text, but your requests should always be URL-encoded (percent-encoded).

For example:

/conversations?filter={"LimitToStarred":true,"ExcludeMuted":true}

This example should be URL-encoded as follows:

/conversations?filter=%7B%22LimitToStarred%22%3Atrue%2C%22ExcludeMuted%22%3Atrue%7D