{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe4ee8b1ea055c687e5dda8257ac11c7faf3f2c3633d177590a73b8b7e4e9ada0",
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    "signer": "0x4cC9bB9360d4DB6F9B4F2BE398Ee9e982964f2B0",
    "userId": "609614723"
  }
}