{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfdf2edc98983fecd3855e5ce9a0ef2ace4e947c13dcc197d7c511a8343bd215e",
    "signature": "0x1cadb4154c2df2184ed3691de876f432e1b79c400cc1820ca2bac088dcbc91912a0c05278503afa6e1499cdc488e595c86b27f8542437a99602341362276adf61b",
    "signer": "0x0169Fade84DebCC7526D531efc537BcD79c1A045",
    "userId": "595827737"
  }
}