{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9ac5ddb24a9d23c8f6b061a232df86132ca5a809a0d173243309edaafa08ed38",
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    "signer": "0x2E263b325cA1a726bb3eEa56748506cA80Afce65",
    "userId": "961975766"
  }
}