{
  "manageEntity": {
    "action": "Save",
    "entityId": "700404470",
    "entityType": "Track",
    "nonce": "0x9f4939c710ac8406b8753aba278c266f661668aeee3b3a452c41688ea6aafe80",
    "signature": "0x4f3101ecb3e8b08d37d6f5d0b7637da6c6a6fac8335b7b34826b660a585127a030d807b7f168dbda1b58f3ee8c4a9efac9b0d2a9ea2399b38d8e679c4c238afd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}