{
  "manageEntity": {
    "action": "Save",
    "entityId": "1475459501",
    "entityType": "Track",
    "nonce": "0xf1b71ce8c796a5db7eefae88533573149128964b811306acac0b4ded1a949df2",
    "signature": "0x74ce368306dcc5222c5c1211b5cd954e1e512dd69c379d83a9f6eb6571fb5cce4f2c549aca91b55f3a0306a9289cee741841cf68e433e247d3c125149e45de721b",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}