{
  "manageEntity": {
    "action": "Save",
    "entityId": "874876202",
    "entityType": "Track",
    "nonce": "0xb7a5bd833f47a0417f04942eb9bcd615750c380a362b7a3e65201d48a74d176d",
    "signature": "0xebf6240a68f33a8d939845c30c7647b6de952a6d502981cc479b643c9f6d618c4317a1209caeeb6524cb2e8e6100326bd0dc444d27be894bddbe4f37431a1d6f1c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}