{
  "manageEntity": {
    "action": "Save",
    "entityId": "1395424991",
    "entityType": "Track",
    "nonce": "0xa01b968477fbdb1356d63282d9938aea460c5ffc40a717620c8b07bac47e36a0",
    "signature": "0x81000d86d59690ca8a0955c31c00d7893f156dcbce8d0e82311b3faade00c1d325e25f62b519ba477021b0185b1ba00868da707e7b14285ce59c46bafb1316781c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}