{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x90a3868590dbbac1959e691f42bbba2b2eff1e89d32ee6aa6d0d86d2a692c8fe",
    "signature": "0x7cddcf997bb790b5886f1a152ce8e3888051d778fe5da2690b4bbecf833560ae3a616164d48e932928c1259855639c6c00060bd1bb8d309f3787277014bfe7761b",
    "signer": "0xf49Ce507Afb6Ae41605Cb1973E8B40897147d9f3",
    "userId": "257069422"
  }
}