{
  "manageEntity": {
    "action": "Save",
    "entityId": "179514920",
    "entityType": "Track",
    "nonce": "0x537201382afbe3412ecb228437a61fb01763b246c873633946ed054ead9eed95",
    "signature": "0x7adbdd5954d84440b1daf67fd9ce55eda6218c5f71a5512645e57ad953982df40f31263bc881cfaf9010b4099603c69e7048434f913b9cd8f663a886a772f38c1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}