{
  "manageEntity": {
    "action": "Save",
    "entityId": "632778258",
    "entityType": "Track",
    "nonce": "0x716561f501a1be582a53642d201b478e5ecbc18bafa1ff091ce9cab31625d7b9",
    "signature": "0xac1dcee538bf55a251207ba9982e1f02e08a44863facbebb7750c5165055400b34daa3a5c44eda934cf7d32fe0a3f22e928e640c219dda520d6819c2fd47874f1b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}