{
  "manageEntity": {
    "action": "Save",
    "entityId": "1869091724",
    "entityType": "Track",
    "nonce": "0xc261953e259e42669161dd735aa08c1f17f0eb915929e9a096356f87902e6aa1",
    "signature": "0x47ad0726d0d301ae120fff31bbaf212defd56fbc3b3b6a33f482744d1186cf864d9efeac6cdb51493a532beabf9f3cd1950666ee3f3a6090c834b3046fd80ecf1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}