{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3277fadca183492c0e2c71db93252fbdd51747557aff2a7a8b99a99ef9fdd53f",
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    "signer": "0xAA5d7D6364B678d1385199130696Ecd6212EAd36",
    "userId": "39831487"
  }
}