{
  "manageEntity": {
    "action": "Save",
    "entityId": "1695772864",
    "entityType": "Track",
    "nonce": "0x3a0d784e21cc81084606b78304ac646e3edc6a028081f749628cce764ddbe2fd",
    "signature": "0x0e5560d244c1e236e404e4121ce50b2711a15cfeccc03c010911f6f044bfc2187a28f35fa07320bd396e80bab537a37a4ec337bd931f1f7aaa657186ddc80e441b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}