{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdfb96331289d773ee94d22ea74c8105b68238bef287c2ab1a4bdc6b39114fe6",
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    "signer": "0x81bae5FC31dfbEBFeDddCEa1Bf962864178Df04a",
    "userId": "111225568"
  }
}