{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x65b9ab86c50394ba49e9cead769370900a9034f20428451d71cbb09f15557981",
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    "signer": "0xC6e4e25195d6b990E37f118FDAb0C8D1d5248688",
    "userId": "889476491"
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}