{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075313035",
    "entityType": "Track",
    "nonce": "0xb921e783e96ef867a988d203a66160dcabdc55a25c5a7de52bd7713469c3d8d1",
    "signature": "0xe62d047a1166bade303bf260fa737c068ec26fe24c51a187c615e79101022ca63e54ff9d13937c843ba4cb00d92d83596ed44990622009530eb75ef17becc1341c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}