{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c1b2636e71af05d6e105da3def6e06234ebd66a14b5184438bb2b33bdf65e4a",
    "signature": "0x066fb09fe944ae088582c710e37ded3a8f85f9d1bbb709f8922712d494f736612557e02527c61538c7a503c6eb98d28c7965d9c3521bd3022e8981139993f88b1b",
    "signer": "0x4D4b044975729f8B03ae75F9BE9be704fFF87751",
    "userId": "740062254"
  }
}