{
  "manageEntity": {
    "action": "Save",
    "entityId": "777530919",
    "entityType": "Track",
    "nonce": "0x22deee3d6f121ea16609c63420724342de24126a122312cccb3dca8831513a53",
    "signature": "0x7dfbd4670c049e71fb48712695ea680f8be5b6791527e0f7d0d60ebabb33d9b86fb363bb53c54f584d8fe17a5e597e4f9fd449e115ada89793c3192b67376f091c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}