{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x10b46e36f90165e49f4ef266d01bc9eb89381777b42750ada8315fe385758492",
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    "signer": "0x8b4751618F94BCa7f99D155E72ba503423b5961d",
    "userId": "485666757"
  }
}