{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x681f03f54ae883c4912165e112aac623edbe03b8ffc526d9d163ce1ecea9d844",
    "signature": "0x01464a987569597f1ff85c3ccd67348fe97c74614a2ce828ea14063b8c98247b208f6077b9ce49202e449253822e6d717f8f155e215824136b991cbaaa208f101c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}