{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479905693",
    "entityType": "Track",
    "nonce": "0xca9e97831c8023fea0b071ff87f0fccb5c0f52a0807c0ff617bc9ad7193e6ac7",
    "signature": "0xa777230755a12d675966a9b6eec703ee051495bd049ff546b7487af860b92af56748e9f77831e0a09df479e035cfae08d9cbebacbd63787e22a883732763fddf1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}