Josefin Slab / 400
{
  "copyright": {
    "en": "Copyright 2020 The Josefin Slab Project Authors (https://github.com/googlefonts/josefinslab/), with Reserved Font Name Josefin."
  },
  "licenseURL": {
    "en": "https://openfontlicense.org"
  }
}

Josefin Slab / 600
{
  "copyright": {
    "en": "Copyright 2020 The Josefin Slab Project Authors (https://github.com/googlefonts/josefinslab/), with Reserved Font Name Josefin."
  },
  "licenseURL": {
    "en": "https://openfontlicense.org"
  }
}

Josefin Slab / 700
{
  "copyright": {
    "en": "Copyright 2020 The Josefin Slab Project Authors (https://github.com/googlefonts/josefinslab/), with Reserved Font Name Josefin."
  },
  "licenseURL": {
    "en": "https://openfontlicense.org"
  }
}