{
  "manageEntity": {
    "action": "Save",
    "entityId": "310556054",
    "entityType": "Track",
    "nonce": "0x4028db2d81af69e506280fabbc219d085cd18e2e12b3a34208e95fd81deba519",
    "signature": "0x413db78dc9760ea7a975733561f4922a850990d6dc5116135b77c59897e7f05d07313156b3bcaad4d4f07be9b5286f3b53a2bdc26df6f8d54a9258e50ae54c5b1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}