{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc16fb434457e512b6f16097522b87365d27d38fa8fbf182edcb7368aa11fe0d9",
    "signature": "0xf8dda2cf3f7ef2636f3ace23aea104a6415e05e78313bcc8ea6e918ade79ce8e21a7256d192f94745671283778f0c2c9bfc2bc00dd17603d3b2fa9c84ff789191b",
    "signer": "0xFdb7279D6dE5a1b217493Fae5a3d919aACE56C71",
    "userId": "74175991"
  }
}