{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961806839",
    "entityType": "Track",
    "nonce": "0x969d3fcfa4fdaf662079b0d2e7496e45ef5741ad427c8fa5fd3736ab3de4bdef",
    "signature": "0xf6384be159831acdc75cd2a4a8bc527cd15df4dee51ddbff69ea312afaa9cccb2c842e647ff78942e498c8a0fca379c498c959cd3f46c87be49f603fdcaebfb21b",
    "signer": "0xf954E35976C0aAaEC2968197F2a371Cc99E7C81A",
    "userId": "102143"
  }
}