{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x91caaa4743da950ef91a332a50ee71a595d2b84d458767df8eb7ca2317ed1b77",
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    "signer": "0x1Ca1b0dD8C999C3DE081d614C49390Eb017c17D3",
    "userId": "746024683"
  }
}