{
  "manageEntity": {
    "action": "Save",
    "entityId": "865772088",
    "entityType": "Track",
    "nonce": "1792410886753314984",
    "signature": "0x0b7c6f72907f140d6b8ab284ec84ab7d5d3b796b4f8c21cbfa293a3884db92237a2341641eb32ed0bfe9e761c3c2f9d48f23b962de84fa7321313da4988d0ee21b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}