{
  "manageEntity": {
    "action": "Save",
    "entityId": "1051757784",
    "entityType": "Track",
    "nonce": "0x2d07297f95283aaf1e199e36e53121f95ea415f0a91995753d153d4da0e3abf9",
    "signature": "0xce508d0d4c31ae89b0cb2946d2461e74054dd52d36e499dd6de5d1fe31e8c2f554ba7d1e081752c7722bd00118cde3b186dae44d07f854b1530a8ac96efde7191c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}