{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x523d1bd399d1c727821106095bd321af399e882f763866aaa262eaeae4201469",
    "signature": "0x325dbb6b23ebd24b08a862ef8f280700acefebac2729ce69cafe60c2d9528bc03c7a7099932c7094eca428ec02d6d7fd033587d13ba23a1161fd2693f5e1aa1b1c",
    "signer": "0xb81DABDd3941bE5fB490e40fCEBe7B6141Ad0f47",
    "userId": "132396509"
  }
}