{
  "manageEntity": {
    "action": "Save",
    "entityId": "190465468",
    "entityType": "Track",
    "nonce": "0x317654cb8f5c3bd6ca723fde241085b38354471b4592d19607ffa084294c1f6a",
    "signature": "0x04979a2f8863bbc2965c22908dcf2b898e9a774593b2eb4c03f317fa18ab3dae0d8eae66755cddf6b20b6fb062354b73d4328cfc1d33f5156351b4e5bffcfb101c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}