{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe479153699bf2f38b8a87207b25ab12f76d50ed90eb447b7735f61f32a3b899",
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    "signer": "0xF4E62AB620B07f17604657770af94608B810eAc1",
    "userId": "585144026"
  }
}