{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5c2164fee3dbd025b9017f8eaa1b0b382b8c48d6a9a4ba70bdc174140106ed9a",
    "signature": "0xf41b8ae42d45f49dcd7bd8f0cdf62ceaf2f79500a196a85a3cf54d91606321d67cc8233cf5ec9ce7ec1915e459c8456bc76ca4de18fd2ad2baaacb3800e034291b",
    "signer": "0x1F64f5d2AFd0Ed70FcA6Bb3Be6B0F4BDc6e4c5DB",
    "userId": "893448136"
  }
}