{
  "manageEntity": {
    "action": "Save",
    "entityId": "226525",
    "entityType": "Track",
    "nonce": "0x2e2299d15476423487e75ab5841d17c976923ba7c749fca1a7834137197ecdec",
    "signature": "0x1bf0019090c13870608286ba6c2da3b209ce743f885a0a95336257c045665eed588f3202a903a27513d4a138fc66294606c2375b799b3bb41a498be4e55d01151c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}