{
  "manageEntity": {
    "action": "Save",
    "entityId": "679808",
    "entityType": "Track",
    "nonce": "0x04b84db21906ba62b934001a9b6c1563d01f58632c01dda9754eea4ef280dddc",
    "signature": "0x206ae019d0a1524e4980b0f56283cabd2355d52da78f3dee9996fc660cc7801114650803ff133baa5bfe0aeaef3d4c82f72a7965697ce489d22fd0775405fb461c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}