{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136303796",
    "entityType": "Track",
    "nonce": "0x7c830777773509c09e72dd7791bb580c1eef89aac8b5126a79e14b9de3d51b89",
    "signature": "0xcf0ffddace3a341d754b11a85108e0d715c807c81efe9ba0b532ed8c8c4c8cfb0a7bfc4940d85aa2dede3e6ab181710643ff3899923cd33e3c18dc43ca8bee631c",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}