{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2661a5d6eaf83959592b7cab498192b4f450d224d54aa10053768fe520fbdea6",
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    "signer": "0x40F423EA7A296D8496CCB40BB242bed5fe91AdAe",
    "userId": "981893037"
  }
}