How to write body of POST request using a sequelize array data type for postgres db?

I am trying to add records to a postgres db that have a sequelize datatype of an array of strings. I am using thunderclient and trying to do the POST request with the array of strings that I want to be in the record, and I keep getting 404 error.

Here is my schema

module.exports = (sequelize, DataTypes) => {
  return sequelize.define('character', {
    name: {
      type: DataTypes.STRING,
      allowNull: false,
    },
    nicknames: {
      type: DataTypes.ARRAY(DataTypes.STRING),
      default: [],
      allowNull: true,
    },
  });
};

Here is my route:

router.post('/api/characters', async (req, res, next) => {
  const character = req.body;
  try {
    let response = await CharacterModel.create(character);
    console.log('response: ', response);
    res.status(200).send(response);
  } catch (e) {
    res.status(404).send('Cannot perform this method');
  }
});

And here is how I have the body of the request written:

{
  "name": "name",
  "nicknames": ["nickname1", "nickname2"]
}

I have tried removing the nicknames part from the schema and do just the name, which is just the simple DataTypes.STRING and I get a status 200 on that post request just fine, so I know its something to do with the syntax of the array in the nicknames field. Anybody know how to get the array of strings to work? I have not been able to find any specific examples of the json body syntax itself.