iOs9 XCODE error: JSON.stringify cannot serialize cyclic structures

hi, i dont hv an errot but when using JSON.stringify() in ios platform i keep getting extra slash and quotes that makes the json invalid.
“registration_ids”: “\ [“cZ2XTORN”] “,
“data”:{
“title”:” Call”,
“body”:“Will”
}

i can remove the slash using jsonData.replace(/\/g, “”);
but the quotes before and after array remains.

can someone help? it work fine on android.