{
  "manageEntity": {
    "action": "Save",
    "entityId": "701936731",
    "entityType": "Track",
    "nonce": "0xb1aeb23c6ea01ccd870afd0bbb1156de0b0192ff85ffd6a3bc366b14fa5fe6bb",
    "signature": "0x752a1425a192d74c37f9c097e918f5cdc85459ed712cbcc4b7afbd1b0960ea0643b3cb4b43b3f9c072287e62e239ac48eb7699663ceec331493a5cd58334ee1b1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}