{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x4526a5d65ec9ef901bb418f0a4065998b3f3b74c7d3db5ced04e40f70ad96719",
    "signature": "0xaeb2dc8c8906debd710f58895dd7e902c1b60e2427efcb9250d10f1baff85ad0206cd7994948a697190192bce3bea08f7c47ce0b8435eee1e990cdca30048a101b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}