{
  "manageEntity": {
    "action": "Save",
    "entityId": "126779",
    "entityType": "Track",
    "nonce": "0xfb469fb464158cbf6048e65f2e2d87dd52ef7a00a1862a53ee99fc0f5682b69f",
    "signature": "0x99bb9b207fa888b335b6ed7eee8ed9352a9052509a6e4a81a08f340c50221f157308308f408171e4f86e2540e786e258988c801f934ec8b7137590a387ab3dd61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}