{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f7ab714dcf4b8dbbc57ed8a4d95ac392cc96af1251f089f1925c2b06a03bc96",
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    "signer": "0x766163A0b3d955a3C5B4e2F3b4a1542d26f47207",
    "userId": "395188301"
  }
}