{
  "manageEntity": {
    "action": "Save",
    "entityId": "1308720338",
    "entityType": "Track",
    "nonce": "0x3079200bc16934f2334432cc4ea7969f1fe6a474362e24c981a983d1c87a0afc",
    "signature": "0xd0b22bb20d18736ddb4cf4b6238eadd38201fa220648b0a3b4ca419d1934701208eeba1c85ae3b1408549c25215c2bd1995e4a001d8c32a6dd4bc79250fd464b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}