{
  "manageEntity": {
    "action": "Save",
    "entityId": "180430",
    "entityType": "Track",
    "nonce": "0xe08375980fc5c792cfaaa92ad29891b7db2209bb16fb7d49f07957c7cd632bd8",
    "signature": "0x7d6296f9314532a72d8bf6cc86619e2aae07e89c49d079f1ee7b2e66fec2189a7efc9a0d2cff76a6832af498cfd5f860e60185ef56da2af82196c74294a10fa01b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}