{
  "manageEntity": {
    "action": "Save",
    "entityId": "409951",
    "entityType": "Track",
    "nonce": "0x6e4d698857a227991f2d4bf1b3be7a0d9e469cbdeddf4caa089b09ec17a02aea",
    "signature": "0x481bcf0f8ae7d2327c1ecb8f5239c2f69d39f3bac931fefa5b433da4eaf399ec3873858696077e470a76384cd0a7473efe9d769224d4fe0825bd3ca72981a80e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}