{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4dac0aea55bc99734d288164bff03e6aed6c6cde61650df9a8de5220757900ca",
    "signature": "0x6abd47a956b6111ea71d8fcc6c5b9d469578662dd89a5f97e539d0a831571c816b150e21bc933224cbbcb39d488bcdaef7717bfa83f5fe25e5f8367424b0ea681c",
    "signer": "0x019Cda58E0Cb5E8Ca28E37e44dB043Fc079bBC4a",
    "userId": "687689059"
  }
}