{
  "manageEntity": {
    "action": "Save",
    "entityId": "861253009",
    "entityType": "Track",
    "nonce": "0x439a2511293f687e8a4090ba597012ca4d7bff2b8be37e04110634e2d87dcf72",
    "signature": "0x4338ed9254f7ce8aeb44756e8a7b40d92c6f4e942f779de9ce94792cea5b49485ab49240e7b1f2d855d3c218efe9a4a2a50a0faf5854836a6143ffa9c9554d701c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}