{
  "manageEntity": {
    "action": "Save",
    "entityId": "634632209",
    "entityType": "Track",
    "nonce": "0x10ff3f53d4c31859a638ed3dc60d4d3f66925b59094ce731ff640b0217279ca3",
    "signature": "0xf0356fae68d2b850b992c6b31def2d50f0fba0ac5b16a89620701338b2cd14cf0a864bdff7aba1279a239bb6d12b63d9d15ee7fe6291f50020b2f966052fd2ef1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}