{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x081120c4672c5073af449b4eda02e08866bcbe6dbe0712ee4cc4ff2e1839c3dd",
    "signature": "0x212c7ad69af1f0f0e8c2704005b90989f30d5a1c6af5f5911351782b03b93d86085e1459aca7384b2a2fa455b8b12419759f6390bedea55ae98984e04192a6cf1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}