{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073974776",
    "entityType": "Track",
    "nonce": "0xde1f6db57f7980141c490cb85ab4a6136e440dbf504bdc72b0399a7f53106dd8",
    "signature": "0xd9a84f37f3f01dd6810799a90dbb7c7ef65cd8c43594bdce0130ffb2c340893f112a23552bea3df3b971513528479557bc421eff9479b6a305650479f6cef31f1c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}