{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777710568",
    "entityType": "Track",
    "nonce": "0xf351b0129461bca7819acaf52936ef796b5de03d0c990914d752dffd585f5cc2",
    "signature": "0x0d1ba168a3b5699d9f553d8183fff143c89daf109bab1e71505cb8d43f7b0c8216100e0e8b0940a099122b367c66fcd00bd493416bd28b391e18917dfc063fd51b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}