{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "758745",
    "entityType": "User",
    "nonce": "0x3fdbfe6fedc868e11985d34a777931c734fffdd1e9f07124c4fea2619a5aadbd",
    "signature": "0xc8b2ca5fe4056a610bfd0ebeb4ea84548ca1deba7c8c5c88efbfa2c0bb35d9a6521f9a6332bd586afe16b1415d48b698a6df3833a32722cdce9959b6005b010c1c",
    "signer": "0xb7C7a8D9d12EBd1Cd438cB065E97280E6D7e912A",
    "userId": "984691913"
  }
}