{
  "manageEntity": {
    "action": "Save",
    "entityId": "1366945317",
    "entityType": "Track",
    "nonce": "0x26b9590348361e584568501a14a4f515748ad9636e8d2cfc887b755a64faa090",
    "signature": "0xe7c21fb8fc73c20ea4f23afa2ae754aabbb50b9e28e51737948066b5dd44fb5a07e408f786be0b726225c2a65bd7dbb2cb0b6ba35bac4469ebdab2f8f7c656421b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}