{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089991432",
    "entityType": "Track",
    "nonce": "0x4d3a3af43dea6dd633b19f87f13538392cf22411f0dba1ba29bde67368fd2426",
    "signature": "0xff8059a24ff27bf93888b0716e3639bfdd42a29919d9889ca32d32f78c83b4dd69506147292ca1ce167e91483f39106f920fd9f1dc066bdbd62b19c72d155e781c",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}