{
  "manageEntity": {
    "action": "Save",
    "entityId": "38483",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb653fd15208afcd05dc1f17ce4aeb88fafbd4092ee0223cde39b3c7c60c7137e",
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    "signer": "0x7B19b580e62b4b9CC2bB882B7f5c9DAaA81605DB",
    "userId": "489106971"
  }
}