{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4194cf09d7a2ea1295f96cb50eef8b6af61880679c23249b45134d7e8fa9fb62",
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    "signer": "0x7c9eeADD59fb6214e81cD9555b456F0F1F5d1fF6",
    "userId": "561696502"
  }
}