How to add json object as type for attributes in sails-mongo

Document.js

module.exports = {

  attributes: {

    type: {
        type: 'string'
    },
    createdBy: {
        model: 'User',
        required: true
    },
    body: {
        type: 'string'
    },
    comments: {
        model: 'Comments'
    },
    metaInfo: {
        type: 'json'
    }

 }

      

        
        
        
      

    

};

I would like to know if there is a way to write a model like the one above, so that I can add a json object to the metaInfo that contains a name-value pair.

For example: JSON: {name: 'Project', value: 'MyFirstProject'}

Is this possible with a waterline?

Thanks in advance.