{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5b1177b78457180966c00ba2be36ee0ecbd2627d4f0de4fdee0dbe2a83e1a351",
    "signature": "0xe4f699ad38df98f3c67caa000303e81403db0194aeaf17c88091238ac820c209337280b3273fa1130156f1582579c1f6064adab72b31d39bbb2c91db71ed296d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}