{
  "manageEntity": {
    "action": "Save",
    "entityId": "692601667",
    "entityType": "Track",
    "nonce": "0x9aa8e0f9dd42ec3acdfc4bcda74f93a7ee4e36ee3ca0ff61595f9656450e06ee",
    "signature": "0x58bf2a7417fc3dd94800bde6deb4be2f2a41e7b641d07833cf9c30bb3fb9c4797eee11b808642cb7c4b6699807823da5eece92de1a02edec54773a014de98a771c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}