{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "21139",
    "entityType": "User",
    "nonce": "0xc448ac127d52f24b6033129a31a10d37a4d13aec1cbc9beca6b9e704d862feff",
    "signature": "0x6c3869db7e7c1ee47396628be4a780bf412a8205df450e747b27222ceb7c8ae63ed104ffd78f4bc4d566bc2596b2dc1a38b4008a294ce1b86ef2789d507d75661b",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}