{
  "manageEntity": {
    "action": "Save",
    "entityId": "1453425787",
    "entityType": "Track",
    "nonce": "0x7836b92c8b51b6903a74d5ba05b5109e3fff02ab5cfc71259d172e9565728bee",
    "signature": "0x2bd7e46464f75b1e28927da9897600c622d8974cf8642d8a4997cd1ee06ba50b359c1596c5947b3e524a3909aac26813dff01d617d9a563256f45f3199ed890b1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}