{
  "manageEntity": {
    "action": "Save",
    "entityId": "1116789",
    "entityType": "Track",
    "nonce": "0xa4a6542eee440df197ddcad37e97dba6b3d5fdb9b7e4b4dbe3c42a11cc9ae9df",
    "signature": "0xc8d104d6afb4925c010a9c250a0076465e3ff164623923ebd03aa529f3acc0a047398fdb49e733eda1403096e7a36bea6999f5cb6237bd17a1a0710fb6e537021b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}