{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x9cdf37549bed744f650474990dd0a409011dbc1fd4f8612643e3704be87ebeb3",
    "signature": "0x76039ef61ab943627546d9afb5e8ae2501e1c5a793beb17e45f1a7ed109e676810c235b3d0e517e5088c3945ed44d170005749f1810ac9a92c87f119e08a0b3e1c",
    "signer": "0xDd9A8C9733bb67d2bc7Db0a430BBF1811643559e",
    "userId": "389482667"
  }
}