{
  "manageEntity": {
    "action": "Save",
    "entityId": "1394899418",
    "entityType": "Track",
    "nonce": "0x2f3de6c49d9f9b98cd2c55e2ea6d3e85ad51db5dc50a751d28f7b833cfe801a6",
    "signature": "0x892ae1515e4644c51788af22d82e8f62fccbaacfa08bc7c0876ff49c66c913497e02e0d4085c80f6cf6dea96c9ec6d1d05e5cc80921963299d0ee4d9880efd6c1c",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}