{
  "manageEntity": {
    "action": "Save",
    "entityId": "761308786",
    "entityType": "Track",
    "nonce": "0x93c0a7712ca0f4cb3ded37e9ceed868aba1c2334c0f746bb0030ad610795b1cc",
    "signature": "0x45e5b924d7ba22d78ce6a6d3515d353ce7fcb915fbd7cb73cb0a3fa180a84b095ffee50a71fcee903b922365d119ac06a82adfa6d315cf715f704761ca191a051c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}