{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4a589f9cd33a9a6057f1d1835208493ec02bb7c563f19f1cfafb3be06484a7c9",
    "signature": "0x0edd67f0e27158e21f2330bcc374a97222b08ea1462bd55102e421a921ecf5591fdbdd814c1dc0612f36f47d45e97b0057c36d48c18af43b5763e7937d7853971c",
    "signer": "0x1f5F68E1660799E87FaBE47981B42492ACd37099",
    "userId": "644137816"
  }
}