{
  "manageEntity": {
    "action": "Save",
    "entityId": "952617413",
    "entityType": "Track",
    "nonce": "0x32cb3e4bd695fff8d19e5c431f92077cc56ac0765ee327c8f19e41d2e9ca5cd0",
    "signature": "0x05081932567d5548fd100547110e1541a1392550c8887a88083ac3aa009e3e355b13aafc91a5925cbc15a722a43654d4f8d65c2e763c8de88f8b2f6b358632331c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}