{
  "manageEntity": {
    "action": "Save",
    "entityId": "2000680560",
    "entityType": "Track",
    "nonce": "0x42e737647ff1e4581333b92fc86c534b8eec2d82f155449e22509cfe1c9fdd4e",
    "signature": "0x71e7a7688cad4a72a4d4632ea1623bdd5de1be3b896c8922c4d725ad15011fad2c2c49fa21815c330e70fde3da34feef355e7432e1b525f10f7f79406b3960141b",
    "signer": "0x8a278E79c8E7e655B94c3e6798972A44Daa2c6ad",
    "userId": "24098924"
  }
}