{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783318283",
    "entityType": "Track",
    "nonce": "0x9c23842326f958bd91c50d60fceb806bf3759b2754723912a69048273edac6c3",
    "signature": "0x1b365cc0989c7e5e1a24155bfa3d7cca4b5554354b0d1bb37dc2619f3452c46d0e69eb434330a588a9c220f6b3e8d196a65c29ec365d55ed18ccc948492b86021b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}