{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xa4519b73db0ee76f7a14edbc628ba1c7e180789bb3967200aa8a08baa327c009",
    "signature": "0x3bbccb540449705a97375b611ea284a3eb592f1135912b3c9b7b51a0809ded405cd80c535d87c3a57b0298bb8b063ccfb0ebba65ba579a6a9c2288ce9a2ecffc1c",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}