{
  "manageEntity": {
    "action": "Save",
    "entityId": "2010485769",
    "entityType": "Track",
    "nonce": "1790736400583886946",
    "signature": "0x6c1be37060ce0042f8489012e319078dc4f75dfba7590f83d821da71532689415249374af9d1a1059e2a9f6e973884316595328eb8a30dc0d7658b66532a6f7d1b",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}