{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217709385",
    "entityType": "Track",
    "nonce": "0xc9b7621744c6be9fa26f01d3970f74174f6a8375211abdfcf2cf264242fa77bb",
    "signature": "0x8a82656cac044b16a63fd10885e1a5ae12fb0ec159ffdcc9a6b5a12a36b64c1344b5f12b8d096fe9a1193391e6d9955b619cb43554f559907722cb75ee6ae1451c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}