{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x484a5c3fd4aa441b85e0c033a3e8a8041b6d2a43efc6db6dd40ab62dca007b5c",
    "signature": "0x25a5d7be9432972b551d7e2d53ae28734234cad4ca727050b29b6247d69875242d30b112344467f74835fd110963971daba3f1a0442055626eee34fe8c9442311c",
    "signer": "0x8C7bee798c0AB93Df67Cd00879d67b02274644CF",
    "userId": "855403"
  }
}