{
  "manageEntity": {
    "action": "Save",
    "entityId": "603024",
    "entityType": "Track",
    "nonce": "0x5f34823533f568635a1e20a0ad3934370ce7998443059f3937a5f8658a069214",
    "signature": "0x1d289f9cb92708a688ead0bb2c44161875d8ebc578a77fa8001fa2d460c245f80f440717f03c09f58344ff3a6362efab623001ba7a687d1ffeea0c121c6f6d211b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}