Capture Access Token to Parameter

I am working on a web page that is sending an access token similar to that used by Facebook. I'm a novice and haven't come across a post addressing how to capture the token and could use a little help. I need to capture the token generated during authenticate an place it in a parameter. I will then need to pass the token in the web header when requesting additional pages. The content type is json and looks as such:

{
"access_token": "1qMo-ua4ybgsB7uPtEF0B4jdth2OzFZS6Ja0-psc5keQaMWlO8WyVAzS7L6hMEGckW_5UL7X09xW3xpXV6ICRx1Qtx7s3rPwIzavAI4oykCJod_iJOlB-XtrzazH0fRfrxHGNgmpl2W-PHRgH349dKt_K9vkMg8C-hAbKZf6i5sB9mkgngAn1PDI-gYsRMosb7smYe9PfZLYDd5_9a6f5Q3_-AsFiEf1QXfDwXXJEj62tORRE_IQBNZDn1kfKrHV",
"token_type": "bearer",
"expires_in": 86399
}

Any help is appreciated