{
  "manageEntity": {
    "action": "Save",
    "entityId": "1162622546",
    "entityType": "Track",
    "nonce": "0xc42f18e90886c1730f3a97bc3cc24d8313e2bbf130995a8c2f26dbb1e7cdd855",
    "signature": "0x3cf6c0bf131856562a9a958f9a05a2ec5fc20b796faf89ea82cfa0ffc193817216ea476255b7f36ca8efb5eac4fe26cf623e0dc430c7c1f42a50842280bc9c361b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}