Stream Enrichment : Invalid JSON Error

Hello All,
Please suggest me on the following issue:
I am using snowplow stream enrichment as per instructed on :

https://github.com/snowplow/snowplow/wiki/setting-up-stream-enrich

i have installed and configured the stream enrichment.(resolver.json file as well)

After installation i am running below command as given for execution

$ java -jar snowplow-stream-enrich-0.13.0.jar --config my.conf --resolver file:resolver.json

my resolver.json file content is as given below :

{
“schema”: “iglu:com.snowplowanalytics.iglu/resolver-config/jsonschema/1-0-1”,
“data”: {
“cacheSize”: 500,
“repositories”: [
{
“name”: “Iglu Central”,
“priority”: 0,
“vendorPrefixes”: [ “com.snowplowanalytics” ],
“connection”: {
“http”: {
“uri”: “http://iglucentral.com
}
}
}
]
}
}

But when I run the command given above I get error as : (Invalid JSON)

I have already verified and validated json on :
https://jsonlint.com/

Please suggest what could be the issue and possible solutions.