{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7115708cb8c971b15c02aec8b45b247eeb2e3c57e7cd3af12a2955c21fc6a327",
    "signature": "0xa8d89525d122618a41b323129323e2202ada9531cca6effbc31e942bd373c966424bff1ddffea7c57f38cac2ee018d1be694ffeb634b70eaa0d6b872c588cca81b",
    "signer": "0x5a46Af34c77870cb99c297df4BBa09661f3A287b",
    "userId": "853751261"
  }
}