{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x308b71a707e24a5330da82075f6fc4d33a3a51ad2e908b8dce1d2e61fb64f89c",
    "signature": "0xed5219dc44cdf02cd872b28db28224ad49f35a1ab5cd063ddb28b4fd677032ea65f913646fb4b9eeec74a2acd2d14dff8b8a628eac543d3b55b71737e525d8f41b",
    "signer": "0xfe0812559692b402114f2E22b5680970591c3e39",
    "userId": "900235710"
  }
}