{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4edfa0ef7b42022c011e33aea556f15e03c4f64518a690cdc0b2e0f270609792",
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    "signer": "0x45476b43Ea7F36e200122F8cd58A0700b6b12fDF",
    "userId": "302150879"
  }
}