{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6bed6fe2b77c4b9cbb59ce37bad756bc08d08cc1b0929f2ab3e446bac5db3fbe",
    "signature": "0xa1bab96e67aba5849341298aca0f35c8d27f1fda83aa24f180b48c886454b0d26364b71208459e51a2e5eb41375ee572522e1c41e94ebc1731007a16f78f98ea1b",
    "signer": "0x705cD505dC4C033c9D74f1F23035707Bd6b9B1F3",
    "userId": "445832820"
  }
}