{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045654142",
    "entityType": "Track",
    "nonce": "0x2afdf763c73c8185b338b938542beff2b3f92f2c9c24e1fc358ca3f3d3dce8a4",
    "signature": "0xfc115382ae5852237a6f396e3bd3cfcc6d105e046845e29c77f60ac041ea6c4273781c6b0a290bea97d00bcbebe87dbcf3db978f447131f35b55a4b21c1005361b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}