{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075807",
    "entityType": "Track",
    "nonce": "0x1542f393640a87ff82747da8c4eed6e74f3ec95aa8c2e86ec4f30bea05712418",
    "signature": "0x4c6a4a7e6ff3b7b37e685eb1eacf53d147601c86dc4d35b33c661122d0b822141dfddbcc07e057686a089cc095608002fb3da5298af690dec9f7f1ec9bcc67671b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}