{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd7b1e8556cad01f461fed284b798a0c21855975a33eb357db1a2e955c7e14ee9",
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    "signer": "0xea5D672007F4615df066996Fa256301441396CAC",
    "userId": "777019743"
  }
}