{
  "manageEntity": {
    "action": "Save",
    "entityId": "464346",
    "entityType": "Track",
    "nonce": "0x15dc7d0108ee01508cf42e3b6e97c52292b7a3710b4438610f17010b857c3c26",
    "signature": "0xa5e251749394f2b1352361ef86161a0dcdf0062ddb940a341c314127d4525ccf77a4443011b98105cf0e25515fa5ab1b8a8d37a4ae1abace933ce1097928f1501c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}