{
  "manageEntity": {
    "action": "Save",
    "entityId": "882605633",
    "entityType": "Track",
    "nonce": "0xe04ce7d9ea0821e298e6becf75d8c0411b047d11ac89f2c36b15e712bc645564",
    "signature": "0x1d7ad36b426658158603c5284cd3da51ff9ab64eeb031a870783100c7ea9ffa67b6a7533cff4dbd25c62d628f6b18d6de5365b1459446f6011a919c69d1f956d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}