{
  "manageEntity": {
    "action": "Save",
    "entityId": "151722924",
    "entityType": "Track",
    "nonce": "0x64348f685ed9d5886ca7a60360ae2d299197642e0628e281e6b11471fd46a275",
    "signature": "0xee58e91eb26e7afd1de8abe4f11a18b3437f8ea3220540c66fe3da091ed4c2fd119468eacf0ac526fdc00bbbafa2fb7e440168a9ce926c405e168821335572fb1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}