{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb303d030dfc2f49629a78803c2c9155efb0dd8ab0a172be9fce71c268e32e3a2",
    "signature": "0x3f7f3fbc1b4c7e4c41e01c6d056daee1045848322cb17b05fa57cd0eb99045a93262909d69e07a8a0538497db4c0c47a4fd7162fdbef99572a973d612c44fcc51b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}