{
  "manageEntity": {
    "action": "Save",
    "entityId": "920222524",
    "entityType": "Track",
    "nonce": "0x5de8785045d2727a0258c19365bf1457060c6e9d7c45fd33c332595e1fcb3812",
    "signature": "0xac29e74337d3e8a19b98e51b98a287010d59776831265b30a4564e0ae082f14f1afeadbce4437a4e516ffe010146b87cdeeb217c8573c48c7fa0b3db4a2a8c051b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}