{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x482049cb4693476d21775ab0194a977b64aeea0cac9aff7dac41c7d4774c3e7f",
    "signature": "0x67fe636e8ba4ab68ea66bd7c67e58d4b1b7bbdef5f3a0c7d0adc475bd50081b146492da26d6f4fc83af0fb6c0dcd5f4ee799fde8bb6950add90122385fa030451b",
    "signer": "0x50Ca70bd63cC1E9F405Eaf4486453cD8A262a068",
    "userId": "395085072"
  }
}