{
  "manageEntity": {
    "action": "Save",
    "entityId": "1384426434",
    "entityType": "Track",
    "nonce": "0x4c73504190059460bde5310772dca57979a4c2fde38eec4f6a147485b71420f5",
    "signature": "0x18a7d99a12e319e5e2cbfa1e2079822a0856df9ed2401224eb0f8247f321f28e67abe028adf11d57955fd0730466d145663cee4393993aa968bdc4d8c9935e331c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}