{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x47c75fa0d8649ed592a50c81d6cfa57f69958e4e82dd67b7bfbb836f18848bd0",
    "signature": "0x2bfd39834ad08d7c584ccc93936309b5fdfb1c75aeec0543d8e7eecfeeef3f664bb24ba9b51ee74963c537b1eb0aea779229b11e0780aa5f4d1c8e42a0fb8d561c",
    "signer": "0xD840f32624AEbA5D5A8eE3Ae1A58a4b6b4596F85",
    "userId": "728762304"
  }
}