{
  "manageEntity": {
    "action": "Save",
    "entityId": "1512537867",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1b533e61afbed8759c2ec1bd49f5ba7758276b9be31b935154b76bc859711a6e",
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    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
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}