{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa61d01eb2fb5dc16a3ffd7be31bf687707f26979cfc89d85cb9332a277f11cf0",
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    "signer": "0x8A7ef0AfA3C20823CA2525BE46EC0010EBE7609a",
    "userId": "990507503"
  }
}