{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe8c738830df7d9e8e77c36895ce4ba4daa7238795e6a4a6ce91ec81961e127a7",
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    "signer": "0x9a823e89F23833ebA1E56815dFa76075018b62BC",
    "userId": "920573113"
  }
}