{
  "manageEntity": {
    "action": "Save",
    "entityId": "531038",
    "entityType": "Track",
    "nonce": "0x1cf86e5972acd7f800df8154a486d7cda215c66b0b9aadfb542f09d511b34654",
    "signature": "0xe8a347c5135a555e4b5c4113cf1df1572c03c97b9800da46d2189fdefd5f8f890774267a86a970344e02b67de4587fb3565f5d6ea6805b95b92c30bfa70913c91b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}