{
  "manageEntity": {
    "action": "Save",
    "entityId": "1989667600",
    "entityType": "Track",
    "nonce": "0xa6d3de56d60ba4ff249dd0fca98c4fcbad191916372f5c3f8b914570e8c5cd18",
    "signature": "0xb6835187c1b7afac5627d9b6baf0b6c25a36f8686e8cf7eda877eb06a657f27816365bbb6639e57d758720c0ce06c0a226421044c04408adc4203bc943da06af1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}