{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x12a10118cc4aee935fbd769d9f847b1fcdd4acadce52faeb060fa91e4e805d89",
    "signature": "0xa9e4ebbe5e2ba2456e38ee4b1bb0b9ced4abc33c9351ffeac0759118a1d0136e6acc5d7a16993c0382d18e0a30ed556e21850e4d2a55e1e956c5164c5dfbb3b71c",
    "signer": "0x8CA7fBCec15984D0a7f65c66D88B0595Ab3101f1",
    "userId": "361437307"
  }
}