{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x61bf7fbfe8c984bd0042304c1fccb92bfb3718fa008c5bb20737c989ae5f881c",
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    "signer": "0xf09c2a0ff4B0aAE8F5F53567d5F24eCC558dc13f",
    "userId": "889836447"
  }
}