gistfile1.txt

      data: {
        type: 'authors',
        attributes: { first_name: 'Stephen', last_name: 'King' },
        relationships: {
          books: {
            :"added-data" => [
              {
                :"temp-id" => "abc123",
                type: 'books',
              }
            ]
          }
        }
      },
      included: [
        {
          type: 'books',
          :'temp-id' => 'abc123',
          attributes: {
            title: 'The Shining'
          },
          relationships: {
            tags: {
              :"added-data" => [
                {
                  :'temp-id' => 'def456',
                  type: 'tags'
                }
              ]
            }
          }
        },
        {
          type: 'tags',
          :'temp-id' => 'def456',
          attributes: {
            name: 'Scary'
          }
        }
      ]
    }