{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05efd9956525766c066f915a95724d67f9591e57296b0123f118654218de702f",
    "signature": "0x75fb130903ea7fa2ae6f19656c013a54b3a167e6ffbec293a5b50c763dda218d5cc30913ff07552fdbe190cd5eb9418448c7eda8d63d6cb7dba4b1ab6d8091521c",
    "signer": "0x6B8f1fA543A03f3fE0C21b80d7f9d0eE451357c7",
    "userId": "284338928"
  }
}