{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc350aa73574029e648c4d471055744bc56e0c58e755a7fe5509efc889bfefc44",
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    "signer": "0xAd7C529d54576fAEEE684A615330a405a943324e",
    "userId": "473382245"
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}