{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "381478870",
    "entityType": "User",
    "nonce": "0xb869e6bc7df4b2b298a30c2cc4d3fbb164de0d2b1cd646444bb87bda50ac1f2c",
    "signature": "0xb6d7d024e37dbf7d168ce0bfb815a2ad3eff510cd9ff1a86fb1e40aa1232176671b2d43b5389b37a38f6aa0cb0c25114761bdcff98aa7193b0f26e070fa7b0ec1c",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}