{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007037585",
    "entityType": "Track",
    "nonce": "0xf02800a76b179ae7db94e099a35759c5b9d227019ef856a67e9e00dba992ee2e",
    "signature": "0x671d409e0515f0c72afe48d740abc3ffc1a95cd000ff503754aee8eed3b9fb586f71de6802c7d2d2c829ed9590510bc9dcfaaadc21243afd8b66dd8c956dcda41b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}