{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040894319",
    "entityType": "Track",
    "nonce": "0xc24ce10b75bc8386ef206360039e0ff77626224c204fc253475ce32907d7c922",
    "signature": "0x2ec9699b7ff9da386f28190f1d868d209c2126440706f788936c7df9d629b4ce42bce5c97f47812160ef25ef4604db7dd55cc4ce72cba089fb9fbf51c5f32f881b",
    "signer": "0x9118544389fdF944C91fbf793f23D9ad02b34dC9",
    "userId": "103748"
  }
}