{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcf32c3b3fecf333b50194c17a03f0634a97ee9653be73ee1a7b66617201bf7ca",
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    "signer": "0x4a6aD7655A778B68A120F68E69f6099b8BB6451F",
    "userId": "721428438"
  }
}