{
  "manageEntity": {
    "action": "Save",
    "entityId": "1597677323",
    "entityType": "Track",
    "nonce": "0x64c208f528a980d397caafffe2659b4a43f12d6804ca37cfed5733b344ed1813",
    "signature": "0x79c3f12500785da71a1baa422cf491593525f8b95aebf895c334f9a1e843c91651fa89fc8299d8e7ef5c8fd29902b7a64ecb097a12e80754121094d6c9d67ab61c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}