{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "345400",
    "entityType": "User",
    "nonce": "0x97f66baae5e2f2cc1b20a11c180181c6f47d133ae14e9e1108def5d28cd35b2e",
    "signature": "0x8fd2556bdb1eb2616a718033bd0e112d353e9622b67489143fddbbf7e73b9ee72c4622a527a9a234783fed3356c61fe898a470f8e0de5ec83c172ee8a9f17aeb1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}