{
  "manageEntity": {
    "action": "Save",
    "entityId": "154960",
    "entityType": "Track",
    "nonce": "0xa2f0b658d28a43886a786d3bba013ac4e7058e936b17b2711000ed4022634fae",
    "signature": "0xe39abd2ae80d39741094ba88ddd543ca60a73b6315cafe599f15c065e14b251b457c62520ebc1099efaf6b528a669e4226f2aacfadc1087a3ceda4b8a20359fd1c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}