{
  "manageEntity": {
    "action": "Save",
    "entityId": "2090540470",
    "entityType": "Track",
    "nonce": "0x962b9b45008859254d82a098ab042a6183221096e606e6ed66f005b50f3bcb97",
    "signature": "0x341146aeec203b2f31a1d9d70cecfd2559c353d145f255d65cbbc70548f0ff8b023b0647e3532812658d0e9f7334086c16a16eb96a40ef98aeadaac4292f7be31c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}