{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "843421708",
    "entityType": "User",
    "nonce": "0x1e9b359598e7c713ec626a81c72b35917713ab7c5549513f7ed24d9c38768946",
    "signature": "0x232a072a2f03c23eb2a7a1d73ac85d2d0d931f048684e695a7b81b02c9a2e93548839a595d92b63283cb9e8d274f0c6be83138bc6653610a1bd572b76f61850e1b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}