{
  "manageEntity": {
    "action": "Save",
    "entityId": "810934375",
    "entityType": "Track",
    "nonce": "0x7f109b8319e8e8873e5ea17d5d70f310b0acb9381bc5ba9e8fcf9f1b32aec99f",
    "signature": "0xd77982565222732b62397abcacaa85023195fc2a8a6dc1cf6072bc8b6afb6e764ff0260cf26c2211eb7c78c6569aed728ebdaa153658006b22b5cc9aaf440a481c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}