{
  "manageEntity": {
    "action": "Save",
    "entityId": "436762849",
    "entityType": "Track",
    "nonce": "0x85db4e0e085a69fc6aa103756cb5c7c9bcbbc127561a40388bc50dc2993b4466",
    "signature": "0x9bcfa11dfbbe63f18f0a18e8ebdc052d70abe7d4db04cf6ab29ea4a310029ca666ea1c260f3dda33413ab2cb2e58fe45de4147c0b2bcf94ae163caf2b187dfda1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}