{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf5ac827e6bea785d70f5bcc0be2f339c347e413ffba943a65419fa16acc31a8e",
    "signature": "0xeec0bba156f30ca473145cc8bacedacdb011482b5860ebf376f6abf8cc33a7af47e0e771ac01d845c432272a3208a11cd864e7ed15b67a491ea06369c7c728291c",
    "signer": "0xbC20c5E6faD1eA77f91e409908dd94c7e3f51E4a",
    "userId": "643719689"
  }
}