{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7ed1fa5e8d9ea5c467be55d96112f8bcbbb8f47e1f95f6497c7b378d43947127",
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    "signer": "0xaE2e898681Fc10Da7E8062C41BB7C992099C09fF",
    "userId": "742300699"
  }
}