{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307438",
    "entityType": "User",
    "nonce": "0x9ebcfb781ffeb0d2cc9e590fbe0745f6346cf747517844b3c89c1c76fb37d9c9",
    "signature": "0xa01a495341b81014b8d62d57350b379fd2d5e44bd5ec0d7c660d644fb2aead02225985f15f6a33e9de8f0e1a9ca188d3b4ec50b2ef74138ed89439f3cb7fd8571b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}