{
  "manageEntity": {
    "action": "Save",
    "entityId": "818636947",
    "entityType": "Track",
    "nonce": "0x12089adb6c1b1eff370b5b1fde87d4118c59d71b4e3c3020bb02ce5b4cfba18c",
    "signature": "0xc414620170111eddd3d683c6f08699e079c93d95119c9ee6fa6b0f8b8284e7892ef21402d31d95f88f11733cb984d92f2022988a7ec0d9dc363c90f56c7e93be1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}