{
  "manageEntity": {
    "action": "Save",
    "entityId": "1138454596",
    "entityType": "Track",
    "nonce": "0x8868198b3a07848be3678b21fd52109be4fae8810f6e901e5528ab6b9505b2d3",
    "signature": "0x1b1f34100707f3570531ce439c8742f4826f0f11e0e294ddeb602b946faac6ee56b19a6563868b49a3082e50d51de2d88ed076f80cbfe9d5025828f4243d0a481b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}