{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "15681",
    "entityType": "User",
    "nonce": "0x4e5d4532e2df165049831ed0b913de0157c2f9c4458c3967bd3c9e76edf81bb6",
    "signature": "0x64fc0694f6b93673af84f3f8df82fa04e587acb509c38503a528ca2520f832587307bf78d68f70153554e4f7cfa2586dc5b9cb1b9a82308f8fe7ecea17a5eea91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}