{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x28db24cd49957948a5caaeed6a33a38288b3770bb4d9f8e99cd5564453ad3cbb",
    "signature": "0x1b3c0910d8f53bd62d7b41886808495c14cf5a0b69e5d93d559484ec29b19d7d7ffd8de3cca0fc71f596783b98f1ba8dcb8af5feceb9b8208a3b52ddf2baaa9c1c",
    "signer": "0x9b682c779356138D1D188CAB373b0F44a2d43d09",
    "userId": "512022848"
  }
}