{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "390804",
    "entityType": "User",
    "nonce": "0xe7bed17e5bce323c09ac457c1c4023d66665acd74e8f01be67458db6c6a70e9c",
    "signature": "0x0892cef019a9d586336053e15dd049267c2a1e3ab0333523f6107af3c86c3479332ff7a2993306d9f0978f4290a89f16fb854b65ca6a42a3cf6d0e420fa3a0911b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}