{
  "manageEntity": {
    "action": "Save",
    "entityId": "1718751507",
    "entityType": "Track",
    "nonce": "0x08cf26463b23cb7754903b60aa148506ba95844c4a57d00b1e456d70f4225be0",
    "signature": "0x8691e9f8e1281c645af88a21952162711419d44f2ccc85cf3e43c425cc587b645ec8a552d3713ddb0c39d001d3ebf80c8ac5590c8cd735e1586b92e40f02c5d51b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}