{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6391b2661a722af4fac9fcb5242c63e4bdcf20b62a74d4d551e1c3613eb07c91",
    "signature": "0xd5db44789b7e7a8cba8211459ec66983dabddcca72ddf766331ee1e843cd2f1b310cb0271b3eb4f0203ef9c79d16bc1f297a3bded882e06e03d197cdd82493511c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}