{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "387491",
    "entityType": "User",
    "nonce": "0xa3f20567645a76960ccce9f73f841b210289ac30149def6f52d3d9dbb2b17baf",
    "signature": "0x625cf2781e03591294cbdd6640eac6ca48eea8abf447403f562e3b4e62ffa02b2c2fc27ca44605845c9502551fda12276a2cabd9a5b3cbcc7a587d86b77639f21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}