{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xba8898ab61fa4740a6b8b00663b3fc6313ee4dda793cecb46269a21e94aee057",
    "signature": "0xef6cdde82cd4986e57da4b5e9ed034ebe7b2e65cbef88be171f22e3e7c5398c26fe0d08a954c2b76d054c9baa2472c8adbbb356591ab127ff4cf8c98b3689ee51c",
    "signer": "0x9d5d1f1a59bB255396F7F1e7DeB307A4F66f15ec",
    "userId": "429311703"
  }
}