{
  "manageEntity": {
    "action": "Save",
    "entityId": "239419792",
    "entityType": "Track",
    "nonce": "0x370475d04738405934d013a405de37b4cb15e1917473aa999053a024cee90aab",
    "signature": "0x11d8834afbc076b3552e4caf87a9244dea75df40ac405ee1299564364b8651714fe9acb3b23fe891cbbe6faafd036e6e96acd50b5aa0f11272feaaed2cf7b4331b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}