{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x615081d93dafec68474463b685e7ebf273d967e6b030fdec7bc9411bde1649cf",
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    "signer": "0xAC41057ec14D7A0f8CbF9F84C7fE65CfcF673CaF",
    "userId": "213018068"
  }
}