{
  "manageEntity": {
    "action": "Save",
    "entityId": "2105570803",
    "entityType": "Track",
    "nonce": "0x7040ad0429043bfe68b08bb90a1c3119774d4557840ddfb88c24be280efeccf9",
    "signature": "0x8f302d1ca7c9494a4efcfb74421416d9c5181298c29e57e9cd3ac609f69f7d931504e64edc59dedf9fbd0d3d095113281326a2f5645bf49dbbf3f314ffbe442f1b",
    "signer": "0x329a0a48B577594F06Ee3ea93F31BcB94E3429cF",
    "userId": "52623253"
  }
}