{
  "manageEntity": {
    "action": "Save",
    "entityId": "329566",
    "entityType": "Track",
    "nonce": "0x1aafd444c2867e7e72e282817390cefbd8debe7d5b352d0740205bbd5494060c",
    "signature": "0xb6455ccd002981e3176af198a851cb8cb54e1c62bfb2a06f6188139d587b56bd793444835b6d147f58d43c396f2b6ec76b44d5a4a2893dc6ae5dbd97c9f590fd1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}