{
  "manageEntity": {
    "action": "Save",
    "entityId": "2055125542",
    "entityType": "Track",
    "nonce": "0xa230b5b24650d87ed79fd65f14006f0ecb58a7abb94787855308c613909e8e4d",
    "signature": "0xf97ebd3336fc0f379a9440448457090edeb86a84b1e0fb90631c66bf116c46ce1a4c24894704ba8af2ed29d20c1388a15af2b2ae1408e3946b1bf7d39e3c232f1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}