{
  "manageEntity": {
    "action": "Save",
    "entityId": "1188880306",
    "entityType": "Track",
    "nonce": "0xaa5cb1ee1d209d6508b3fe725434f2bfb162c19e6258e96bb727cb1d15588a5c",
    "signature": "0x8793f83db515d672832f7de01f111ae580b76ccb58b5791d0a5ffbfd8518db11616573fffc2a81421862d5a47b957372a5ed42ca963407091e0f1dc2144c7f0c1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}