{
  "manageEntity": {
    "action": "Save",
    "entityId": "1420434769",
    "entityType": "Track",
    "nonce": "0x3bda59c997618fe5895ef116c21cc156f5f2445abb3b844d862253befee9c795",
    "signature": "0x0167978be975e481f729ad88e6cad24206376359c4236b1a0374049ec40d46af1ddde14ab6ab2d6b8ac81f19d09ede2ad85f6e020004a615df739d56450d64d01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}