{
  "manageEntity": {
    "action": "Save",
    "entityId": "99945595",
    "entityType": "Track",
    "nonce": "0xd7293c41428720180516e978ffb135130f5c9e16ffab3c2f166be04bd98082f4",
    "signature": "0xef6ac1e355b9c35be75f00a2c496b4f65fd00e8f24ad05de126e3aeaeb05cf3c07a2e80e1c0c004188762a5e40d1f1baf6491898878f01cca18461e689acf8821c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}