{
  "manageEntity": {
    "action": "Save",
    "entityId": "379131923",
    "entityType": "Track",
    "nonce": "0xdd3bc3b51310e795cafe83e152572179482745ca5dfa9287d63614d5878107a5",
    "signature": "0x8fb2419307050e1e6ca466b1426bcaae7a48cb47aa963649f28ee6503def444f6c5c3c3bc16c608409ccb8f5b3afefe593435f165e58b8c0ce3b7fadd3e35abb1c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}