{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370922307",
    "entityType": "Track",
    "nonce": "0xb750edc8c5177161e619a88a57f8ac706db7469aa4ba38c2f829159b3da1bb89",
    "signature": "0xfbf37ac04f283d04363033e29eed51af04e98e3703ff0a7d579a7c7d4c718d8e61b9789dc2efefd9b547f6c3daaeacec0c81467ae7db5c4508ee70835e180beb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}