{
  "manageEntity": {
    "action": "Save",
    "entityId": "949547677",
    "entityType": "Track",
    "nonce": "0xcea9203f42a9eb0618b3527acc8bd564ef6830bed9ea26e11032222870e46b51",
    "signature": "0xca6dcdf1afe7143b7869190f30b8da183f66fb175edb85fc45844db69a44b9186d580f893d4caacd1ad91cf9eb37700637db9a061bc688480432f328d907d14e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}