{
  "manageEntity": {
    "action": "Save",
    "entityId": "819775779",
    "entityType": "Track",
    "nonce": "0xa51b1fa1c4921358ff0dcc99cd02f8fd7f57a3cddf656bbb3f716875d919ac61",
    "signature": "0x3c856a33372c36207a944094581ce8024903e12e7b156a3093364d229e2192a2264f4c4b174c8ecafbed84330658eb2a74ddd1e9d3946620c18438d2364bfeac1b",
    "signer": "0xa4F2b7C5923c7C3cea6ABbe732D1556A9a36960E",
    "userId": "313524"
  }
}