{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530917900",
    "entityType": "Track",
    "nonce": "0x1045bf35a9f1b0036e4a79bb11aea0e5e850a4ab9955d9670c986c63cd61232e",
    "signature": "0xb908179cfc4776f0fb8c4e4d6a0dd32ed55acd6c9d13bff0a0ee1d7892c14a4e7863015bb7f9c925eeda93f9c84d2a8a8ec85d9169abdec584e5130237f651d11b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}