{
  "manageEntity": {
    "action": "Save",
    "entityId": "815125955",
    "entityType": "Track",
    "nonce": "0x22db900da10021c01abd788ca33a2b7fd4be9a00ed7994011ef202d385d31653",
    "signature": "0xbdaae533726808a83cdacafa4581e2bfec13f079d57b0a3f4508eaca3ae59d8e725c82f4fe880b76344a283f2e542a686154e3fa0757586d470b502a6712d9811c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}