{
  "manageEntity": {
    "action": "Save",
    "entityId": "1341693253",
    "entityType": "Track",
    "nonce": "0x2ad430e3f508c65d4dcb8561508b17d062903dda9733f92e588dc542ae3724b1",
    "signature": "0xbf42378896970f242446d2432bfff658f2ac2fa140e9773760783f11b36e6bb43513b8ebd4f53afc162fd49591155f4d10e8952a753bee52a5d156c56733fb571c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}