{
  "manageEntity": {
    "action": "Save",
    "entityId": "14507693",
    "entityType": "Track",
    "nonce": "0x31b53aecc2ad4ab505206c9d8a284fceb9145e6f8c292a2b399dbe58afda48da",
    "signature": "0x03cdd988e3c50eb2543114ed3fcfbcf4a6b60d269472e619b5c426152b2420a21a4322b56748a6c9c9d04136c04b58ada914874a3100661efca280157000d7961b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}