{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "506789556",
    "entityType": "User",
    "nonce": "0x5d0ff58322e22a6432de5066dbb0f857d155ed8c48a3d4710d662fd9ba49ed57",
    "signature": "0x2eabdb7a8b98ebc757bc4da2ce3233444a81e88433c00406849ebac8f423c8993d221b84e2186cbb01672ee2674e3564bb9031bb4d45d845e90e14fb1a8677441c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}