{
  "manageEntity": {
    "action": "Save",
    "entityId": "67373493",
    "entityType": "Track",
    "nonce": "0xd93b0355f895285cf0c1c61057ba45f3fc029cd988a0fdc5544a37eb95a71207",
    "signature": "0xa163fb03dc0d9556911b8ff8e58c1929c8d281e153416d685c098d083f03fa3e490c0a76134198ca93660d1d1412b6eae2a460978d5271ba1192ff9952e07e471b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}