{
  "manageEntity": {
    "action": "Save",
    "entityId": "828430462",
    "entityType": "Track",
    "nonce": "0x1240bacee66a59f618b81fcacd076940d7c145a49eb09ebd46dd69d1e12416c6",
    "signature": "0x21c95b3dd8f0ae8b5a034b088f40344ce1dc8aa3cb3d549e79bcdfc39501e5a37a65de8104304a1b4d0fffdbd9c886f700e98411bb90df8f4a242c3b357c09b81c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}