{
  "manageEntity": {
    "action": "Save",
    "entityId": "351588158",
    "entityType": "Track",
    "nonce": "0x838293a63da63c66feeff326496e53a5534ae940b8d4e688170a3e40724de107",
    "signature": "0xf75355a4aa98b3420fa611a6c8367278eaf7349006468d14b095a5e256f1585c6a060635936e1490f1d0db0a03f1b11154b0051e149f523a81356182cfc83c2d1c",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}