{
  "manageEntity": {
    "action": "Save",
    "entityId": "320267787",
    "entityType": "Track",
    "nonce": "0x8caa22578d0ebc7465ccdf93333dfe5bef26c3624d1309585344d1f67b0939fc",
    "signature": "0xb16ac53044ecf97f5c2fdc9ea667027eebf74c5dce1f46ccc7d50688b4b0118728ab9ef0f0895603a8138dd47bcaa728ab46ff03fe90a150bc01bf329bcacbf91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}