{
  "manageEntity": {
    "action": "Save",
    "entityId": "995893610",
    "entityType": "Track",
    "nonce": "0xd2b1cd53ca1c4dc681231bb26c841b4ea9542df23297dd00da0b3684f3257419",
    "signature": "0xcc14ea7d89446f62516b7be68ff9f7df14d837e134a1047c2229c06540bc6a8a72f65d34fee34ce14c8f20d37e9605abb60ac4e01af5d1cf75f0f21d6041eb461b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}