Problem with sending notifications

[Kirill]

I use a script to send mattermost notifications if new tasks are created. He works. But if the title/name of the task has this " " sign, the notification does not come..  

import groovyx.net.http.ContentType

import groovyx.net.http.RESTClient import com.atlassian.jira.component.ComponentAccesso

def hookURL = "https://****/hooks/***"

def activitiRestClient = new RESTClient(hookURL)

def creator = issue.getCreator()
def creatorUsername = creator.getUsername()
def creatorName = creator.getDisplayName()

def issueKey = issue.getKey()
def issueSummary = issue.getSummary()
def priority = issue.getPriority().name

def customFieldManager = ComponentAccessor.getCustomFieldManager()

def cFieldTeam = customFieldManager.getCustomFieldObjectByName("command")
def team = issue.getCustomFieldValue(cFieldTeam).toString()

def cFieldSeverity = customFieldManager.getCustomFieldObjectByName("Severity")
def severity = issue.getCustomFieldValue(cFieldSeverity).toString()

def cFieldWhereBugFound = customFieldManager.getCustomFieldObjectByName("where is the error")
def whereBugFound = issue.getCustomFieldValue(cFieldWhereBugFound).toString()

def teamMentionMap = [
"Bw2": "@bug_%s_b2c",
"wer": "@bug_%s_omni",
"vf": "@bug_%s_kpp",
"wed": "@bug_%s_oes",
"erf": "@bug_%s_core",
"edvf": "@bug_%s_wlk",
"not specified": "command not specified but %s!"
]

def scopeMap = [
"prod": "prod",
"test": "test"
]

def teamMention = String.format(teamMentionMap.get(team), scopeMap.get(whereBugFound));

def body = "{\"username\":\"New Bug\","
body += "\"icon_emoji\":\":ladybug:\","
body += "\"attachments\":[{\"color\":\"#FA5537\","
body += "\"text\": \"${issueSummary}\","
body += "\"title\": \"${issueKey}\","
body += "\"title_link\": \"https://***/jira/browse/${issueKey}\"}],"
body += "\"text\":\"${teamMention} new issue **${creatorName}** (@${creatorUsername})\n"
body += "Priority: **${priority}**, Severity: **${severity}**, where is the error?: **${whereBugFound}**\"}"

activitiRestClient.post(
contentType: "text/plain",
requestContentType: "application/json",
body: body,
)