{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa661ffc8e654fc30c14bb105040283e93bc2d9d0e69c7c953dcc3a38d980279f",
    "signature": "0x016830d778e373f0c6f23fb3a5b86873fc3639e90e353c9e4d4a3a51f62b73fb7dd0ee0380118f21c74d7e22a40f5a3bbaebeaf06f4d37887721d2bc1d2692271b",
    "signer": "0x495cb29b6fC5014C4F1005589a40B4D919Db5E95",
    "userId": "824972439"
  }
}