{
  "manageEntity": {
    "action": "Save",
    "entityId": "99075757",
    "entityType": "Track",
    "nonce": "0x44a3e72137b631e959f7b247ddaa46119028eda2d17b703ed94020dc6ca4e47d",
    "signature": "0xf57945a79671dcb29157dc3d7fa8a380fc2030f9c40ecca88b562c31aaf3e5753087a61457cdfb223199b372e33d3d5980c6351148c8096cc41159d28e2f9a781b",
    "signer": "0xB085B17F3eA070b3b88093887F568e1E0e8E929c",
    "userId": "54858"
  }
}