{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645720561",
    "entityType": "User",
    "nonce": "0xbafe99e2dfd508dafef1194fbca4567cee74eb9dc61106eb82d589402f27bbe6",
    "signature": "0x76a2540715006fa9c1b73c1dbec7f2b0f958a834b91af9645feb783c89440d9a18381742ac8a9ddec38feed91fda59ad4aa0167f364ceab4d6ef6044af6f8f3e1b",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}