{
  "manageEntity": {
    "action": "Save",
    "entityId": "1992141124",
    "entityType": "Track",
    "nonce": "0xc3027ac0c52a5b9407b3d7ab95bdfaa50fa3d0491f169f89a1915e04c96844af",
    "signature": "0x0b65f572612f93a5409b621d7df1b2513d52ab06452f88f792dc292eedd7aa2528cae2b9346e90159f930939310cec03c07c3fe75fdc41bdf6daf7ad4bb4f7da1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}