{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x011c8e8968eb6188e20bbf848fe4b1361a9583ddb02552ac8e7c722e2e82be7a",
    "signature": "0xcea9748d426c24f477b3e7d98d08c90a944330875ad6aace4e2eed8bdc08ebba3524ef4429399c2a166659978d2efa4e450d276cf0b8119da6c26224784027271c",
    "signer": "0x2d605901F4DDd5De51e526E8E2ADF7aC0a19c248",
    "userId": "5352096"
  }
}