{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa8db1cdbd14965027e6841e9d1436797896e841173635c909b5d57c6b05061a4",
    "signature": "0x034fd0928254b91247fa6767d0840ad7934750ee382e7da921070acd1df7d6a121b0b3cbf5c0bbffa1fba1d60ba4077d7ab1b42ed0654a0a53f6597c6f31eaa81c",
    "signer": "0x9309d7e48f46fbac605153ee4a20E4561DA646eF",
    "userId": "808965742"
  }
}