{
  "manageEntity": {
    "action": "Save",
    "entityId": "1040410534",
    "entityType": "Track",
    "nonce": "0x09297a7f163c9b4c8a40486cedd55b44bb4a6623a00305b09b6604e6333739ab",
    "signature": "0x1c01bc107c14db4ded6064a7942928653ccf9d1290fd7e09098c4db683dd5d401146157608cafd2c335e724bece5cc1aab02b1d5bebc36bc695594e0bce404b91b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}