{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003625839",
    "entityType": "Track",
    "nonce": "0xd905ff20ddd6b04af59875ceee9eef05ded3aa184e05adfa92fbf7c081f11f8e",
    "signature": "0xc7073b85b4fe64f63cb70ad9707064d510375747852b00ed6af048ae3f47f21e2297c5adae83e986ebf144db0311b87366a940b8e6b35541673bfe25374ad0f81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}