{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146144916",
    "entityType": "Track",
    "nonce": "0xceeabb407f20e6cff20c43e41562fdbdef647f0c160e3fa5ec64fb3eee1000d2",
    "signature": "0xdbcebcb26b2aca1a1ebba018d8c3c021f3bba9a0b8f224dabb7b12e8a0d21f6975499362ed5a00ba51222b254a566e81c2bb545186454c56be68f977aeaa38e11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}