{
  "manageEntity": {
    "action": "Save",
    "entityId": "933856252",
    "entityType": "Track",
    "nonce": "0x4ddf8230bf197e6e15ed137eacbd39fd7e3a9aa23f58b92b09250bd6cd3fa439",
    "signature": "0x1b7531c5127ca26b63ba125b94a0bd7cc8490b9c7a5a4fb3f148bc3861dbc4042b953e60ede77ec901a543a3ef8166d2e232c5c03c032ee57555a764626f50e81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}