{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x42748040202b989edd26bf1e9f63622e88aa91aee913882b3e8b41b30f8a7192",
    "signature": "0x32df716ad072a13fd98533babeef7b42cd857159a6d5b946144e80d06daa3b3d19af79f1b1527268ab433827033ae1a4a16b0cebc3ff5b7aec21d84c943d45e61c",
    "signer": "0x45F40EB86CAf3f80B8b69db1aC6A8b8EBE39fd04",
    "userId": "968229238"
  }
}