function getUserDataFromRequestBody(sBody) {
		var aMatches = sBody.match(/({.+})/);

		if (!Array.isArray(aMatches) || aMatches.length !== 2) {
			throw new Error("Could not find any user data in " + sBody);
		}
		return JSON.parse(aMatches[1]);
	}
Retrieves any user data from a given HTTP request body.
@param {string} sBody - the HTTP request body.
@returns {Object} the parsed user data.