{
  "manageEntity": {
    "action": "Save",
    "entityId": "437829",
    "entityType": "Track",
    "nonce": "0xa212a3378e1a485855ec3b821fd7120ce2f1803756b0ef9f23cd62e3e88320cd",
    "signature": "0x361aceaf815c34bd67edb9598ff24161b83f57f35b59f172502a340292c106011c34943c4b134df1489a4d06bbf36b361d6680f568f8fc6ed4932c5e1071038d1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}