{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1532aa68a06f689f668bf3878465fd8eda8efaf0d04ea02463b624274b09e934",
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    "signer": "0x6B9b16f42DDDB7E3781E54F27748eB873219D173",
    "userId": "723186160"
  }
}