{
  "manageEntity": {
    "action": "Save",
    "entityId": "492656",
    "entityType": "Track",
    "nonce": "0xc2355b8a134efcf2115a81e1736d2f8a0a411d46f0ef0c2721f513730b8d5c66",
    "signature": "0x6eb0c517dfc31a2b2a1346d4f11386863f1b1b454a6bef51ad87e1b99d7ea0800bac6b9202c7929647374be96c413cde657a4d2726ff7de8307c752c8998f4831b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}