{
  "manageEntity": {
    "action": "Save",
    "entityId": "231845928",
    "entityType": "Track",
    "nonce": "0x470711d9ba2f36f3af41871cfbc22bd350e1f03f49d148e693ab62c5a9e90139",
    "signature": "0x2abccc8e9fda8c568237d8fd3092bc802b2415af817878e868593219100b76aa2dbd497fa4a7b34fc48287d853d7d5849f51062b4d96cebc052e8038e7c75a661c",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}