{
  "manageEntity": {
    "action": "Save",
    "entityId": "1979691987",
    "entityType": "Track",
    "nonce": "0x7210835cf00ca47ea4200bbf44030256d35fcc9e263db4d5f818029fef70acf8",
    "signature": "0x1b474c3f916c9e4e37d3ba81e343e844e6b0a88a7187fd4d0e438939c2d5f76079fee247d3241ac2cd3e91cfb59c828e064444fdbe47e63b50083b21b4b2298a1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}