{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104095803",
    "entityType": "Track",
    "nonce": "0x6f49b49e87df38b23acfcad1011855dd91cea580d3238ee4f50df32c9ccfde7f",
    "signature": "0x2d15eadca34c3e1068b5b933ff2744e6c3b7357698890969c3ab1b8aa7dde0e03ea071f7cde86fd411fe108bfa9d69c42af4cb1a24597e6ec6871da97a491b781c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}