{
  "manageEntity": {
    "action": "Save",
    "entityId": "1206357640",
    "entityType": "Track",
    "nonce": "0xdff2e410df381508fbd31a4acd23e16bcdb5804fb066675fa6168e9934c4c6cb",
    "signature": "0x79768a43c894d674111a7d61f7ac508c49680674aaf0660813ed7f88acfabbf014719625e38d415d2c220b232ea1641c4fb4bb25fae9a3535213eb73545581541c",
    "signer": "0x16Aa077b74922B66ea86D34Ca75b5d4C99c9D81D",
    "userId": "340690975"
  }
}