{
  "manageEntity": {
    "action": "Save",
    "entityId": "126768",
    "entityType": "Track",
    "nonce": "0x1a1fa9d40e6efba2f3d1a0f947bcc110bef959ccab24c7ca4b96a038b224cf11",
    "signature": "0x7a2aeb2c0164fb3ad874a18810e937cf927f5a43543cbf42d0ac9e8aa726764956b09ac888dcaf46491de01cbd2c025cf7257dab690cf643fca79aa282b924b41c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}