{
  "manageEntity": {
    "action": "Save",
    "entityId": "1841021246",
    "entityType": "Track",
    "nonce": "0x5fd8bdd508ec8c1c81e0d1733befe9d39db432eec43a89713847092cef29a1da",
    "signature": "0x0282b28030c6ca9926ff4f043c620bc361c473ea6abe69e309922b4bdb8171ce7320324b815305a0986290355790f19968f4f7ddb70f050a3cb84ec7593785ea1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}