{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123495",
    "entityType": "User",
    "nonce": "0xf2a0fa861c70537877d0a246892c1d8944debe7b1c7065866fd8458d24b7368e",
    "signature": "0x2c03d0762de2e5dd4561829fb48a0fc6dc43601d9363d8c59587424c34221f4449ede7ddc14fbf717cda99a1ce398abf22f4ca5eb5a9bb09cd71e7fb55f4a0d51c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}