{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x542cb0325433e8bdbf8638d0228f7f08c0b7ef870618867dc5cd8abc1351e7e6",
    "signature": "0x7165cc98ddefd06e9d35098f8e6de805fb26af057f8c35c0d5e874225742b8496311d29298707a5fe375361ee4188c1cc7a407e89e45937334be8699b9838fee1c",
    "signer": "0xaEFa40feA52091946C151469Eb611Dd74177f554",
    "userId": "65828371"
  }
}