{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfd31d76652fe01d28b61ecc9d3b0ccde02aefe47ac0f16decb325937d39cfb0f",
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    "signer": "0x5d2ABA274DbF55C18c09F96C93Adcf12A8c189Ac",
    "userId": "51143394"
  }
}