How to add json file to Xcode project

Question

The below response is from webservice in json format, and I want to save this payload into a txt/json file and add it to an Xcode project so that I can parse the payload from the file in the project.

company_documents: [
    {
        Owner: "Company Administrator",
        Revision No.: "",
        projectnumber: "PRJ-004",
        node_path: "/Construction Publication.pdf",
        Description: "",
        Pub No.: "1",
        file_name: "Construction Publication.pdf",
        type: "Document",
        title: "",
        foreignKeyId: -1000,
        file_size: "778689",
        parent_node_id: 5,
        uuu_create_by: "Company Administrator",
        file_id: 1147,
        Issue Date: "",
        foreignEntityType: "company",
        "% Complete": "0",
        Location: "/",
        node_id: 2207,
        upload_date: "2016-10-10T08:08"
    }
]