{
  "manageEntity": {
    "action": "Save",
    "entityId": "479177",
    "entityType": "Track",
    "nonce": "0x12d23ef5124e444c0df0b1d69bcc9c34dd6467a6928586d74294a1b0c758a7c5",
    "signature": "0x9ca1474be27e14be14a7a2ee65baf434dd623ed54c2088a006e902d8b4afbf327ce336b2fb0fca3fab875c1d4af7143ddf119682620aac501a13b8c485d8b6e91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}