{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224576464",
    "entityType": "Track",
    "nonce": "0xba9c492447af248cd12d7e66818326c5d94589b4a1cb1bef324070f84f138404",
    "signature": "0xcb91c480437d9cbfe745aa3afc27b3600b907d2fd8fbccdc7b44d92212a7cc3c369be3ba05ee024c7188a26e7f88eb2b891e85a64082c3a37dc0cde66d597c5f1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}