{
  "manageEntity": {
    "action": "Save",
    "entityId": "1198426585",
    "entityType": "Track",
    "nonce": "0xedb606801dcf78da1f1ee24486700a2cad2687f794a750c81ce71c51b79e10b1",
    "signature": "0x3ee0b7f61406c3bfe6b88f9fd70387576681d4e64da7a9af316033403ff0b9a81197077adf06614c9b80de528643034b27871f2af1e7dd9847cebdd425944b831c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}