{
  "manageEntity": {
    "action": "Save",
    "entityId": "171079640",
    "entityType": "Track",
    "nonce": "0x967b6ecc449501125e8824cb16dfe5760e2065eaba1662e0ee8118a7054ff982",
    "signature": "0x022ef357c54c931e65a5368a55fc8cbe4dcd3af4ee029bc91cc258270ad991653e4b197002e938ed8c735c2af8f71d7f937b76daa72e5793614209674f607df01c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}