{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "778620549",
    "entityType": "User",
    "nonce": "0x7f7122cfb9e9620e8d14e3d4a2a83d87fbd2df198572997bf8e6fc1cad3fc25c",
    "signature": "0x353b43bfd2d065eb40050cf08a63aba13a71519730af7935eb4c4759b6cdfeed1eee252aa6b93bded349e71881c00801ae561efe032281b9475162fd8db41fd51c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}