{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "157628",
    "entityType": "User",
    "nonce": "0xb4c9a4827af1559ad05bb4db383f1aa204233c5d7f28413f66f399add0adcab7",
    "signature": "0x07e40e563851a31ce5e31a4d01db4f543c14fe4603e9c1653c15acaefbe544a011635532f6011d2f0b46308e8fae2db9ce953e1c97868a062de8d3b8002223791b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}