{
  "manageEntity": {
    "action": "Save",
    "entityId": "625371011",
    "entityType": "Track",
    "nonce": "0x3f22f4f8c4f535e77d42756b26e9029b8393d47fe0c3056081e7c29702dbb4bd",
    "signature": "0xce85f0996759f7edd3b755264b8e9fdcd02c73abb8bc0199b2a483a2deaf5fbc69fd07dea9323586be574b038cda5c29fd92a76c20bc873852311c8173c643831b",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}