{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358506400",
    "entityType": "Track",
    "nonce": "0xb24bb28db05f0b6d53d9803cb2d04d305797705d2bde86257800017b61969335",
    "signature": "0xf624482f5c2227d84cd251d6c009cd2eba66f361971acfb05ce3d5f8fc8fa01a295e34a8afe0d8730f4a6723e18b2889745089e1a497a2b018ee709d01427f611c",
    "signer": "0x7B0C8223b73b88E2ff71FA991cd22e99D81fA154",
    "userId": "394678487"
  }
}