{
  "manageEntity": {
    "action": "Save",
    "entityId": "1076628870",
    "entityType": "Track",
    "nonce": "0x4740d6ca464b22878d802989009389f3c4e587eb4feadcee4c1d98d2ace8a505",
    "signature": "0xf2c3deab22d10c6d680bf5764b5bef1c8a2b6e4a31986b260d78a7b39d52d37e715fd9bdd3457e3c80339363e4192f1f578309e579bcece13ae7dc710cc7fd511c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}