{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x84c4f39a80aaaa5027f8f33adb3b4024b9795b9ca17b33d094d604285e26ef70",
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    "signer": "0x5e5aC2579481E6F8C2fdc522ff196d6F7C6C2830",
    "userId": "771424265"
  }
}