{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf0666bec09ac46ad13442f3dc96a6b605aec290daabb87df089e313a33bc29b7",
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    "signer": "0xe736f795Ea084d88447ff37bf22dd91c05359319",
    "userId": "658774480"
  }
}