{
  "manageEntity": {
    "action": "Save",
    "entityId": "1396824653",
    "entityType": "Track",
    "nonce": "0x71eb83fe54fe1d72349d2d26e4eef25b4eaa43d5b0d02c09d0139f01e9706b48",
    "signature": "0x02d3518b01f42fde216e0ee87194a84d480b8758c27fcb4245833710c12374dd38d602fe3efbf666c0ee8b4c079eb8247cb13ea36e6093671bf60c4e36aafac51b",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}