{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x403c51782b540cf3363b6ae31d4355e50bac9a54edeef438231ffa7288e72e0f",
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    "signer": "0x4C052e8c3ED797880d3Ca030B888b01f8ba28520",
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  }
}