{
  "manageEntity": {
    "action": "Save",
    "entityId": "628352",
    "entityType": "Track",
    "nonce": "0x717d137ecdaed315e574996271f9e6962a90a92da3712fe3c16791d8edd4d4a9",
    "signature": "0x3c7956a06038bb98369942c10786d3307da180be6533abbd815b8009f6487cf71a9882b97c02e4bdc58aa33f40d7e886cdca88eb03a0d634814e0b209f780a841b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}