{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500406517",
    "entityType": "Track",
    "nonce": "0x7a9659acf3fcb0066b59bbd23805e52259a4c0783a45ae992317066fe3ece4a1",
    "signature": "0xfde879f32fb06435054c7ec99c5f10a0bc33e971a38e9d3daab40546a7c536942566cff51d79359938fad89a7d528c1aa24143af5f3bc160ef9a221c8fce86051b",
    "signer": "0x06Ad5789cE045C5B0AeB97849051a7385CA95B4a",
    "userId": "270209897"
  }
}