{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0807a2873064b6a3b9c442221567d636851a2f4a44c753b5405a7ca1c0d19553",
    "signature": "0x593ba146e99839bdcc681d6f2d816ce3ba6357ea8b68150a07399233182db17a4604e14996b950e1cd486c21cfd1934e089b35ef8cb87a92d557cb13b20828911b",
    "signer": "0xe8BAaf9d67869BFe993951C60524b67BC331bac9",
    "userId": "75683930"
  }
}