{
  "manageEntity": {
    "action": "Save",
    "entityId": "752608848",
    "entityType": "Track",
    "nonce": "0x9b700503707dd94de0183499567d1cfed55179df020730c88fd995c289db509e",
    "signature": "0xce98c43d0cbd2f471cda1820b3ccd1963391dd6fdcc04eebc060d52c862ba51c25ced709aa54b6b051c1e918a2a7cdda573b02027f9261ac3b75aaf0a2bd328b1c",
    "signer": "0xa22176a11BF6703EFe39D488aA7cC06aa781C44A",
    "userId": "633924738"
  }
}