{
  "manageEntity": {
    "action": "Save",
    "entityId": "338232720",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0d753d3a6f0d7c52eeeb08cabe2d8cf0a7bb5d8eb8bf9a35490d2fb1221deef",
    "signature": "0xbf5c2cf4d6330663ed4fdd051a3a4506427b1735e0a8b6d36e02176ca47c5df8289818c2f6fec7ebea7e01ee3b4d4b9c65ce6a85e069e260e0f3d4170a92862c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}