{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896983141",
    "entityType": "Track",
    "nonce": "0x57c165181854cc8dc44033eb2bc28c6b23826be4557b61f9ba1b8edd2971a615",
    "signature": "0xfa7c07bbc0c09a091cf72a347a9794e419017d2859f8c90db31c86db324485a55191e6b4afe064f04e83933cbe0c76016c0c2791d6d51e5ba79530a4a063921a1c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}