{
  "manageEntity": {
    "action": "Save",
    "entityId": "1181510549",
    "entityType": "Track",
    "nonce": "0xf9406619556dfdbdfa7789489a14278256c090523994145e3f8261447459794b",
    "signature": "0xfdf5bcb5bd29a1c9fd3f9e8b77202375b8186f5a445407cb34af9bb901a2157429d418c338023df88158ab02dacf68c70ca8a84f46d9f0dcc2a3300b6ca3a3091c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}