{
  "manageEntity": {
    "action": "Save",
    "entityId": "2010638518",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd57052dfc37c6c0548f526aef19b3cde81d52e0a33e172566456ab047ed201fe",
    "signature": "0x444b2413aef1411ad6486d8fcdb288dad8e1cbdbd54cf44f6dcfe8498049ad8a0f0c250049a0ac6feb98a6361c1d7884f60369668de652f79362e32022c5b0a41c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}