{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070247998",
    "entityType": "Track",
    "nonce": "0x124bada304e857f447b59f92272946c2cff8d997a10f19e4a20ee8adca253c9c",
    "signature": "0xd5d834cdfc2012c29019bb793ff9da195eb07e11945dba7e745fd48814529ab25d0ce38a677a16df367de2d3fc42dd4812ca5671f234b35a407ced6a2172a3c41c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}