{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441490331",
    "entityType": "Track",
    "nonce": "0x8269c32c74e275a3eb09aca946456db3508c9e74b8e7c7a757c6754777b96576",
    "signature": "0xa037f1851b9318fdec4f36aa1b9bc18f3a45859d7afbf5c7dfd8d142a4c452f8789b421101e4772dae3a44ca87560e1d42b3fff83b9c285cceb3decd3e1369721c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}