{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408329395",
    "entityType": "Track",
    "nonce": "0x08ed6f0d88898515a7e40aa36941694a8984467d861413460a4c93ba4863f5ea",
    "signature": "0x5b47ad880298c21504b1cb4438823960a8b912b5ed015b3bc89e3f9add74e2541e4b97df5b325aedd41b896a8771bc53be2b0666b8914b6248fdc2ab34d3ab2a1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}