{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4fd01a5f8ca3582deac15d2483103497692227e021b6b0740455d623753b143d",
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    "signer": "0xa2cb59F34B214Ad2201cb8EA941F48ddd366142a",
    "userId": "10724789"
  }
}