{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1cc98db28447038b4f05526129bdda7cc51683492661f6d03c0e3e3144d93e06",
    "signature": "0xf1d7b97d927dc69dde4dfc3f5080d11ccd0a4b28c1565f89bfd5973cefbb6ae96b63e78ad662931c08dae41d0bd740149f59a45a132eccc5292b8ec2ceb9ccce1c",
    "signer": "0xEFAB3332CD5EA33e9817aa57B32CaCb8Acf973A4",
    "userId": "407216161"
  }
}