{
  "manageEntity": {
    "action": "Save",
    "entityId": "761245",
    "entityType": "Track",
    "nonce": "0xa6c53c8d84e40a43543cb972412c4346b9f78ccded3ca1b378c12673d359b329",
    "signature": "0x16b85464485b9c86809acb401de03af9f37801a80da2bf554360900db1bfc675707a8d91d83dd8f39b26b25d41a623d614cdfd780525ec8b676cb425244577421b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}