{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x70e8e9d9644aac1806beb23e907cca25eba107a63ae65e5a6c95c7ec0c636ebd",
    "signature": "0xe3a98b32f795c02168c6ceac1e4528c016c5c90809d5b0d3e5a55bc2448289a73f9ad3e81068f502661df07f8956f45c8a3b8f0761e1f5b5ba390e755a100fec1b",
    "signer": "0xbf1512a4755AA9909ec2b9b1E386424E0E7b6c72",
    "userId": "868171077"
  }
}