{
  "manageEntity": {
    "action": "Save",
    "entityId": "2096779218",
    "entityType": "Track",
    "nonce": "0xe8629fd3daf925e9690c17f53fb09196965e6310c2d132492fa4318450f263eb",
    "signature": "0x71bb90a9420aed9b80b7c881522d41c727fb2aa451b1eccb0f45f696229adbd40d50a54ad623c891fe8809e8a66cf27d4aea307bdbf6f54472739cf721138e2a1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}