{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338476",
    "entityType": "User",
    "nonce": "0x2f3c7785da65e6dd737637bbcd4409be8cf91a28c2fdddb4b29ff86805eafeb6",
    "signature": "0xa36c20cae8bcbd9cb28f65bf40c2c18162b2fc66a03d492bec1e68c0b5856fe0540bdf83eca8bd5f97cc85ba1210cf602e92f253cf06fc0a0c6005a131d9e7711c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}