{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0f0342cd232ba1746bc481394fda78296523ca8f613a0190bdfb7a369d097328",
    "signature": "0x4f2f766bd929347d5e3446e50380e417b2ebe1fb2d038dac81e3e0d5d670d1956e9ee22e1c8574eb2f69cb6a9e5b40bfbd8ba378fc944d32fee027043207520f1c",
    "signer": "0x3Ec9E017e31a38A18602E735a761076100861F7b",
    "userId": "910895194"
  }
}