{
  "manageEntity": {
    "action": "Save",
    "entityId": "212056030",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5102807bc82af1fd626230146c976c6485074872c87a9b47aed903e3f510b4d3",
    "signature": "0xb42be41c8a346bca0d77898e693d34019bf06e92b8cf452f4914e088ce8ae07e53a7da6abeb881891234169f53aa8dea70a9e634f99858f21dcca5a7d5a78fb11c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}