{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x997a743f2643cfb9721cf9accc2c5aeddc4e926171b8b9377e309f47310a0057",
    "signature": "0x0d1a6db2b0bf116f8f59c6a726291de5db710d71ec61406385bf455f6ff0fa007c82af63f03d4c3bc182e0fbc4634a99554b55d3b2777a5e289609bff42a8f251c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}