{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd8e24a93601e92394f4b31ce99e28e9cc3860b376020bbe876e04066592250b0",
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    "signer": "0x4E073b7076371ff6Bf848d0B4abA785B38B5ff1E",
    "userId": "303393509"
  }
}