{
  "manageEntity": {
    "action": "Save",
    "entityId": "2018090554",
    "entityType": "Track",
    "nonce": "0xc3955d01d23eebc3e418d50f82cdea2f7f0098c4eb57fc23c05b7ade9b43e037",
    "signature": "0x09c97bef21e3fb7fcad3a207b02b4ff036571a21c25a32468f08f67da1f327f77a2a6cab4c26167b8ab3e18d437214ad266ffe4e60af18b2cf6d6998ad2e72d11c",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}