{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5b60874cf38424adc4334b9806735051461269e87e07d1118d6cd3b29df9b333",
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    "signer": "0xC4e7DcD6A5AC88f4E86b3459Bf65129acBdd3794",
    "userId": "108256647"
  }
}