{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd56b75902ca9e29e4365c8d84b32002bb32c73543460707b3c920d6d8c7107dc",
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    "signer": "0x0Ba449F7400A162187E68F598615C66D109f77Dc",
    "userId": "294846622"
  }
}