{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x06e3e9e4da1079537234ef092bd4a6c84f032a70785c1110b5dc09149fecd92d",
    "signature": "0x61f09432a57f4d24be08e09a5b599aedba52f7e74920703807e35f44b6143f52681e1ab374f75e7ba082b6ab73fd02b995f451adf4184a74bcab1cd6b337cb6f1b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}