{
  "manageEntity": {
    "action": "Save",
    "entityId": "921996519",
    "entityType": "Track",
    "nonce": "0x3d9d3c089991e6218c283940b4aa34b283f27f14cd6642f01a8e584515095368",
    "signature": "0x050798e25f851761fd10b7f605623709f090ef5e072051bebd8f9c1a4b150eac2b2d62d88981a8e206d87b3d22c17a17ac953900bb98881f08ef8977e990eab01c",
    "signer": "0x80737CCa077373D199dc8620F35c0cE5969e318e",
    "userId": "100011"
  }
}