{
  "manageEntity": {
    "action": "Save",
    "entityId": "34484668",
    "entityType": "Track",
    "nonce": "0xa867cffc76b5c80131d32d037f183d6f5f1edcdf1f1b16a4ab0cff31a45de3b0",
    "signature": "0x0d0ed74fbe14d9f9b5c5a9fe6caec5c4303872f7b72733f1c2317a5b5d840df007cc36b6de042c176d4ddc4ce311d18053865c2fbd4ec27886f530b234280e4a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}