{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x81fefdfc6eb32047ebd3991bd6b7778b80c23de0293f5eecccbdd270fa12f198",
    "signature": "0x3d500015e81bade3fa89ebe6195e83175dc0903de5fb8074433033a64d9672662b8beef4db9a55d8dfaf7124955e3b5b6026b6ce4beaf89abfcd4a3d693169111b",
    "signer": "0x434E6E903F887d1123e2415651292ED71aC170Eb",
    "userId": "643976014"
  }
}