{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd9f420fa441e9a96bf23536435692eb6455740be2d0f14dfead0f1c171c05c4a",
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    "signer": "0x8cAb834F826D5A147bF5434142f6D07Bc0f4978F",
    "userId": "827837269"
  }
}