{
  "manageEntity": {
    "action": "Save",
    "entityId": "1383833834",
    "entityType": "Track",
    "nonce": "0xca04df3162fcd2f63be46b7e99e668fc0450c012f3402cdd59a93349969b2149",
    "signature": "0xb35a3d7ea4a143a8ef745f3c3239aca5c56438fc7702d98be8b07f37de2999334fc15d668842c81f566a6ee402fa093d3cae6309e1b47928144e8d0cd56378151b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}