{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x05a9061908ce991b770b27c27abffb9a36dbf38f26bd360bec42fef16c24d3d6",
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    "signer": "0x711593aBFB1733F1c6Fd17CAd453D026c8b27348",
    "userId": "319590005"
  }
}