{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984319392",
    "entityType": "Track",
    "nonce": "0x63b075be3934882c12ced5df3cddcd931174daea42b932ae2598796f5f9cdb28",
    "signature": "0x36e6ac71ee66e1570dabb920126944f051df35296e30dabb6b1292ddee404e207396ced32d0bf22630d57824546b03a9f03c90acae4ec1597578ce5481c450a71b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}