While mapping stop words analyzer, index is not creating?

localhost:9200/my_index
{
"settings":{
"analysis":{
"analyzer":{
"my_analyzer":{
"type":"custom",
"tokenizer":"standard",
"filter":[
"lowercase"
]
},
"my_stop_analyzer":{
"type":"custom",
"tokenizer":"standard",
"filter":[
"lowercase",
"english_stop"
]
}
},
"filter":{
"english_stop":{
"type":"stop",
"stopwords":"english"
}
}
}
},
"mappings":{
"properties":{
"title": {
"type":"text",
"analyzer":"my_analyzer",
"search_analyzer":"my_stop_analyzer",
"search_quote_analyzer":"my_analyzer"
}
}
}
}

// output here:
{
"acknowledged": true,
"shards_acknowledged": true,
"index": "}"
}
why it is not creating index. can anyone please tell me