{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x0a8dc9acf7eaee7dc8eab55534461f7b9c78b229d6bc3ccd890390c0528b71d8",
    "signature": "0xce7ddf1d7c2be99423322000e4a2012897daed207e87ccdef3412d7fc7ab52812b957efa5646d55c8fbe04a2e8187690598ba5d6bab068937c61a570ac9074db1c",
    "signer": "0xF300c20BDBB459E009c4E55c08CFd33E12f8B0Cb",
    "userId": "782218508"
  }
}