{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x72fb213bf27a1c979700fd2f97db06690daa927f0af93b361e50cbde6b34619c",
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    "signer": "0x403878fAca2D7BCf6E9b8F7364B70d2213b5E167",
    "userId": "355569194"
  }
}