{
  "manageEntity": {
    "action": "Save",
    "entityId": "1735476784",
    "entityType": "Track",
    "nonce": "0x5738c014195ac4a8bf859b7f01a3858b7298d6b86099c01f3459bc3c611b9c34",
    "signature": "0x656b2a009dc296cb992627c5181051a3b2e80046b96febbdffc0f92eaa42182d2dca365cdecfcafbb9c4ac02826ec5a79477caa262c012bb6a8caf4259ca76141c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}