{
  "manageEntity": {
    "action": "Save",
    "entityId": "22325189",
    "entityType": "Track",
    "nonce": "0x0a0168e2ec38a6bd7b11ea03f902bef0cda773da79ef7b918f3343c88380587a",
    "signature": "0xcf949287c7cfe8b59b6925f28f005a132042bc58d0f3aca48bf74ca029e4b6e511129d596e10a66dcea9604656dafa114ccef517117ffe2c1eff56a9a9c9ac811b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}