{
  "manageEntity": {
    "action": "Save",
    "entityId": "432526049",
    "entityType": "Track",
    "nonce": "0x81780a7345593d3e975b6ec206bee7b55c363f6e00420b31f54909294cc79f7e",
    "signature": "0xf6b51ea20e74313acd877829c4b7327628d58ff2447d28e8f687ae0294e065c8236bf77aa0218636307c85eeddf3e8c766d3d9ac7430accff78b76ba03e791b31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}