What to do with the + sign in the token apiok parameter?

Question

API

Good day, at the second step of loading the image, I get the token parameter, which contains plus signs. When sending it to a media topic, the signature generation function (the one in the api, not mine) removes the pluses and replaces them with spaces, which causes an incorrect signature error. I checked this by simply replacing the pluses in the token with spaces, after which the signature was generated correctly, BUT there was an error of an incorrect attachment parameter. Am I the first one who decided to use this parameter?