{
  "manageEntity": {
    "action": "Save",
    "entityId": "545426",
    "entityType": "Track",
    "nonce": "0xc83684b0ddd60526440ff8f7d3af1a85c89c0273a2862a7a834e9e5259fa4ee5",
    "signature": "0x8ca37b5bb577b739736e53b5de1c2db14fef75cee7cca22585ea0ca712bf03475722326a350dd40b6540bf645c2cdc360fcc45f1fe70755d752e7ac15ef0ddee1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}