{
  "manageEntity": {
    "action": "Save",
    "entityId": "1758892984",
    "entityType": "Track",
    "nonce": "0xd11a438e565c0a09a6f714082bb3ee788aa13a9af8b8fdf6a834801ea39ea455",
    "signature": "0x331c0406da15575646ddd0ba3baf8b270e54930a504a1fdd6b87e9e69df6227c77a92431fe8da5816280ccccbed99a8e56297f9ace1767a652fe4493809edad11c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}