{
  "manageEntity": {
    "action": "Save",
    "entityId": "636171608",
    "entityType": "Track",
    "nonce": "0x2880342707b92732db977cc60c6b53e362b68c7cdb8acf79499aa8b82ab420a5",
    "signature": "0x9f8f9b30b23646ae2565f1c52f506b49446ae3bb0cf0f394528f72d2707cea1c2fa8ac5d8a2ca6c2d7babf0af63423a759a068dcdb111ff78b48c0e85ef35f1d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}