{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235764825",
    "entityType": "Track",
    "nonce": "0x52f7d4399152997091f1475c7c8489a58d03ec82ed3e5abdb437af90cf373d58",
    "signature": "0x14b45a5fb3521ec3e59b1f88dafc0dfb419270819e958782bb3e25ffba26686b4cd70929cf28ea8136d7d6dbf9ee05841090cc15b572a0a5408426bd7ab335001b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}