{
  "manageEntity": {
    "action": "Save",
    "entityId": "993388160",
    "entityType": "Track",
    "nonce": "0xa1ee709516cef5c30a2ece7793ce01a44b27be155db9b6acf5257fe82318e57c",
    "signature": "0x77e0f2960d60fc7d240dc7415b229a14382b8fdabcf9fa71ed2f962ee4f6b7bd6fef2b87a2f6e4772a7c4a9037d0353b5f52b9e4d2181705715a155481a472e11b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}