{
  "manageEntity": {
    "action": "Save",
    "entityId": "828430462",
    "entityType": "Track",
    "nonce": "0xa0eda4d34eb85b5b18a975a209e34cbdb71e1316dec4801d4ee9a2932aa16380",
    "signature": "0xc44f750a644feb852e69a64698931e2f283044ee7fcc27607d711063a5489ea77644fee7ff7293c882f0da2974c9556078e10d4759b050596dab764252b49f271b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}