{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb5e529cf5366e7ff71a8068781bdcdc0f8ecd0de56963980574e8b9a318eb436",
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    "signer": "0x2Ce5541185e6821Ec88948FCB0CB0C207Ab1bB31",
    "userId": "232802248"
  }
}