{
  "manageEntity": {
    "action": "Save",
    "entityId": "911669",
    "entityType": "Track",
    "nonce": "0x4117675a74ad322f8b39eaea4158af061fe93e832c0a4564555cfcf22d75728c",
    "signature": "0xe84c30113d3f69b3428f0da6f4d5a8947efc80c92c2527a5c0e881eb42fae0a01ddabe762661287d74b40b78bf8287e89f4091a105a9aeba1dd6a7add8e191a71c",
    "signer": "0x53D42Fb704046C02f8bE0D91710a648422f859fd",
    "userId": "327048511"
  }
}