{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca0e901d574e4af0e5ad6edd0efc33373175cf74d0b069476c500e18aa7f03b3",
    "signature": "0xbc976023b7a9ab42059683363eee9e72d0e1e134c3b551a8e8cba1eed597381b2a2fb6a9a6fb31f4167fd16664e5dc575ca96f881f864654201ade6b36eff4121b",
    "signer": "0x5cF5222c093911F01AF2Dae6f993D120421f29b3",
    "userId": "740438126"
  }
}