{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb9df658d6a9607c8571011a04f90acff8baee690c29a7baa6ebbf4327e20ec10",
    "signature": "0x383db13b275b9a82a3e2f10cbe6d69bb31b5f859921623ae4c829cf18b6a9a2f5fee78c82cffe3ac7858fb4635635652946d9039c04ea658197e618a1cdb4b4f1c",
    "signer": "0xDA5EF39662B4ef70B52C25F33b5637165C93DE3c",
    "userId": "479039338"
  }
}