Data

?itemtype[0]=Blog
&itemtype[1]=Member
&itemid[0]=18235
&itemid[1]=1382
&fields[0]=userid,name
&fields[1]=name,user_title

Response (92 bytes)

[
    [
        1382,
        "Update"
    ],
    [
        "tom",
        "1 2 3 4"
    ]
]

This help response is displayed by adding &help to any API call. Use the Raw Response in your apps.