{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc8cce6073494444c3696ec50cda490911ff4f951dbd4ff54930e61a077f4e40c",
    "signature": "0xde28baf6017f5ab3affee1e5bca92d7a29195b7bae1353678104dd2c794e196f4320d33c9b7bfd88d57b91c7b6e6a4a24de6762f1ddc89ae8b9b26fa6a8289511c",
    "signer": "0xaE0E6dD972558C970ce5A58DFc8FeFC0220dCd09",
    "userId": "208609774"
  }
}