Matrix

{
    "fields": [{
        "group": "Default",
        "name": "Matrix",
        "handle": "matrix", // This line is optional
        "instructions": "This is not a required field.",
        "type": "Matrix",
        // For PlainText typeSettings & everything inside is optional
        "typeSettings": {
            "maxBlocks": 9,
            "blockTypes": {
                "new1": { // To store the info correctly this must be named using the string "new#" not using duplicates with other blockTypes
                    "name": "Block Type A",
                    "handle": "blockTypeA", // Unlike above this is is not optional
                    "fields": {
                        "new1": { // To store the info correctly this must be named using the string "new#" not using duplicates with other fields inside this blockType
                            "name": "Field A",
                            "handle": "fieldA", // Unlike above this is is not optional
                            "instructions": "", // Unlike above this is is not optional. If no instructions use a blank string here.
                            "required": true, // This is not a required field. Default if not provided false.
                            "type": "PlainText",
                            "typesettings": { // Take note unlike above this typeSettings is all lowercase.
                                // Use the typesettings for your selected field here.
                            }
                        }
                    }
                }
            }
        }
    }]
}