JSON Schema: Check the array to validate if a certain block of JSON objects is contained in it

I have a JSON array of arbitrary length. Each item in the array is a nested block of JSON objects, they all have same properties but different values.

I need a JSON schema to check the array if the last block in the array has the values defined in the schema. How should the scheme be defined so that it only considers the last block in the array and ignores all the blocks before in the array?

My current solution successfully validates the JSON objects if there is only one block in the array. As soon as I have more blocks, it fails because all the others are not valid against my schema - for sure, this corresponds to the expected behaviour.

In my example, the JSON array contains two nested blocks of JSON objects. These differ for the following items:

• event.action = "[load|button]"
• event.label = "[journey:device-only|submit,journey:device-only]"
• type = "[page|track]"

An example for my data are:

[
    {
        "page": {
            "path": "order/checkout/summary",
            "language": "en"
        },
        "cart": {
            "ordercase": "neworder",
            "product_list": [
                {
                    "name": "Apple iPhone 14 Plus",
                    "quantity": 1,
                    "price": 1000
                }
            ]
        },
        "event": {
            "action": "load",
            "label": "journey:device-only"
        },
        "type": "page"
    },
    {
        "page": {
            "path": "order/checkout/summary",
            "language": "en"
        },
        "cart": {
            "ordercase": "neworder",
            "product_list": [
                {
                    "name": "Apple iPhone 14 Plus",
                    "quantity": 1,
                    "price": 1000
                }
            ]
        },
        "event": {
            "action": "button",
            "label": "submit,journey:device-only",
        },
        "type": "track"
    }
]

And the schema I use which works fine for the second block if the block would be the only one in the array:

{
    "type": "array",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "items": {
        "type": "object",
        "required": ["event", "page", "type"],
        "properties": {
            "page": {
                "type": "object",
                "properties": {
                    "path": {
                        "const": "order/checkout/summary"
                    },
                    "language": {
                        "enum": ["de", "fr", "it", "en"]
                    }
                },
                "required": ["path", "language"]
            },
            "event": {
                "type": "object",
                "additionalProperties": false,
                "properties": {
                    "action": {
                        "const": "button"
                    },
                    "label": {
                        "type": "string",
                        "pattern": "^[-_:, a-z0-9]*$",
                        "allOf": [
                            {
                                "type": "string",
                                "pattern": "^\\S*(?:(submit,|,submit))\\S*$"
                            },
                            {
                                "type": "string",
                                "pattern": "^\\S*(journey:(?:(device-only|device-plus)))\\S*$"
                            }
                        ]
                    }
                },
                "required": ["action", "label"]
            },
            "type": {
                "enum": ["track", "string"]
            }
        }
    }
}