{
  "manageEntity": {
    "action": "Save",
    "entityId": "524046",
    "entityType": "Track",
    "nonce": "0xcc239c585fb2a9731d42f409914bd066239cf395e922a699565fc71b88b7e230",
    "signature": "0xcaef32fa5e33f946e33aecfcd29b5e45e7418d5154a62ee4a2c57ddb2a5b792a223fe2e2b35b3c52376a2a81c575b797018685570156f43a07ef806a179e11681b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}