{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x306c91bacdda3dbb45f7b88d9f44b0c00670c2266333995d71b5815121b8f3f5",
    "signature": "0x8130a8eda778a0f64feafa5dd3701e9558ae3be038e545007b75c152c9a67c7c57df0f20badbde46e171883eecc7e8102f3facb4208410e8deabce2e4b7449641c",
    "signer": "0x28365F81A4E0da37FC6090C433f68d6C572395C9",
    "userId": "34664839"
  }
}