{
    "city1": { "eq": "Moscow" },
    "city2": [{ "eq": "Moscow" }],
    "city3": { "eq": "Kiev" },
    "number1": { "eq": 1 },
    "number2": { "eq": 1 },
    "number3": { "eq": 1.2 },
    "empty_string": {"eq": 1 },
    "value_is_hash":        { "eq": "Moscow" },
    "value_is_empty_hash":  { "eq": "Moscow" },
    "value_is_array":       { "eq": "Moscow" },
    "value_is_empty_array": { "eq": "Moscow" }
}