{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x40138bc70e991c930f7fa52aee3826bbb3af23534eafa0619055f822c8fa5a20",
    "signature": "0xc65d237cfccfd4ef21ae22c66e3e3641bfb36d1a7d3ce968386ad64ad62cd56236091acee87c598e093ec8969e04d362961b799f6cbf71970caad286e674a5e01c",
    "signer": "0xD9A81296607A057616D2BdFEAa51375208b7fbc3",
    "userId": "343798350"
  }
}