{
  "manageEntity": {
    "action": "Save",
    "entityId": "156922989",
    "entityType": "Track",
    "nonce": "0xfd39c90c4da1ee3f151c1d138e7080fc82ab9fe36fbda5eca3a8c153e8ec802a",
    "signature": "0xe3a05f4c340a2d3706d2947eef2b5430b14378f48daac8b928e5badc9c26c1db42c50ad61fa6de5ca8e9414a5001b3743a1bbc712d7be3459d486edff6a706bb1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}