{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x86bac52879f2e13e50f462028f5f991e443bb83e52a95175dd14149b435e89b3",
    "signature": "0x9fde1649360c0844302bee5f01087224992e8d1294c6520c9ec29adfd68861ce33307bf2a0d6fd9aa53979e37ae17cc4c8363c8428e4c792ca17e48742a048f21c",
    "signer": "0xA6471Ee9DFE4EC106125Db2A30B377A6598bBc28",
    "userId": "893245689"
  }
}