{
  "manageEntity": {
    "action": "Save",
    "entityId": "547242",
    "entityType": "Track",
    "nonce": "0x175903cf040e349ffda1e8c544603e2664e1429c8308daf30f69928becf35248",
    "signature": "0xe7f18ce806517d27e2fe3b373bf602c8eaee68d1325bdf7d715a62f3e7dbeae1170de0b2859868e83f91732658de913359173ea118bbc80d60c1f1eb6b3cb82a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}