mutation {
  MergeMusicCompositionHasPart(
    from: {identifier: "ff562d2e-2265-4f61-b340-561c92e797e9"}
    to: {identifier: "59ce8093-5e0e-4d59-bfa6-805edb11e396"}
  ) {
    from {
      identifier
    }
    to {
      identifier
    }
  }
}