{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe84d446c274170ca07dc304f4a37ec47e2276d3cc0e3bbc241b1a3c0a8fd210e",
    "signature": "0x703e11e94df803c106a495132a64c075921ed54c953ad48682df7e5f1e4539d931aaf114b968949599d8b8aef79aa85b699dcfa8089eb37ab118c505c62d861a1c",
    "signer": "0xaE46c3AEC218EC7Af3a2a4EecAa5d42502Dc32Bc",
    "userId": "419000210"
  }
}