{
  "manageEntity": {
    "action": "Save",
    "entityId": "110028702",
    "entityType": "Track",
    "nonce": "0xecdb8ffc9c447f6d98d412d17631be1857369410cfd2716d8b8cddd6187d00ba",
    "signature": "0x614c891e29688e16c1b11707d8b7e3dbb600783dd2a137a4a5014f24f38cd5450c1adb89fed2852a60d932511e0013d752172b23ca538bc9065f92b0c748baa91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}