{
  "manageEntity": {
    "action": "Save",
    "entityId": "986342",
    "entityType": "Track",
    "nonce": "0x0e02d91618e13a505dffd543ed1cdaec48d314ae7eae31c2ce17f17963b81904",
    "signature": "0x553379cece5e0a0e119f331818f63155b6b741ebcd75a233c208d4a1be31bd5e49b954dd9c0a2191f2cd9f1872faa8548c6a5d275d65a166a34bc2e8dc2aa1cc1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}