{
  "manageEntity": {
    "action": "Save",
    "entityId": "1844397773",
    "entityType": "Track",
    "nonce": "0xa3b6d7f525105ca536aaa594a09d0bf36974a6e62daf40546f1a8d2bff879587",
    "signature": "0x7a41c35b1c66ee12ef0c05bedd6cf35a2c8a36c84d3eea0c96d9c259f202c8b4155e182e3827905c70e039ed4f8e39b55d429e1ddbbe3a5dc3d137a99c65def11c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}