{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xabccae2fb42a4a696be0e3c6164a31433795683a552a9e1f3532bab304d6db58",
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    "signer": "0x4Ae361795D851f22E5b3F1736Cd63aB45A019AB5",
    "userId": "368835365"
  }
}