A filter test to be applied to each row in the data set, where a match can return the row. Filters are string comparisons, and values and dimension names are not case-sensitive. Individual filters are either AND'ed or OR'ed within their parent filter group, according to the group's group type. You do not need to group by a specified dimension to filter against it.
{
"dimension": "QUERY",
"expression": "string",
"operator": "EQUALS"
}
