{
  "manageEntity": {
    "action": "Save",
    "entityId": "758894678",
    "entityType": "Track",
    "nonce": "0x0a6ee45ccc89ad40ec97c73746d526fc0695e7814aa63f72839e69a14867f4fc",
    "signature": "0x1b19049260b5efab748d6fc9f3bfb9242f3b4fac3a1ae0660b1936353157e7f94199fafd94b725bbaa5b512b6bbda87968b9444117d7cc722f66d85778bf79541b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}