{
  "manageEntity": {
    "action": "Save",
    "entityId": "1318157524",
    "entityType": "Track",
    "nonce": "0x8863dcc7a686d2913a79378d9937bed11a7d0a3a9c97f2a4199b7aafce16ef50",
    "signature": "0xf5ab229b1072a1555693f43f4c7e28433b07bcf2432acf1f602eb63471e9c9483ec0d7a7b1242809feace3d1c01701a0c733a463141cded0734b44a195cc835e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}