{
  "manageEntity": {
    "action": "Save",
    "entityId": "451965",
    "entityType": "Track",
    "nonce": "0xa03dc239f6ef877c9318b43080dc97be7bfd663ef656febdaaa5f74877914d70",
    "signature": "0x55eb5b7a5f646e6fc5a618e07ed357fb6ed1aaae1b6a51cdb5323fbda150aa9d7a20a413a0c564b92581ca4bfbed1baa245fef231b6f5a37a0dfb5b65830da451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}