{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfb148bf0c23c02348b2d3aa343e9643ec54dcfba815c24e98d62d535114bb06e",
    "signature": "0x3ebb816cb79e7f67592cd6d38248deb5ee651ffcc51e54e39276687946d3b64855f41f43f73a02dec15463b2a1d4844b927dd65ed07f1a709139ee37cb0a798b1c",
    "signer": "0x6aeCb25B834a4f95Dc6C5113816B2C748b30432f",
    "userId": "999536589"
  }
}