{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xd4166fbb6755adde529e761f6b8d2b070d68b63ea3e534d64c84825fe5783629",
    "signature": "0x75728f66b1f9817ed47e9df4eddf29f286612bd77727530b634709f75418e5a63be3f89f997283ff767136c2d7d1e6a61509b8f00f9648c60d5d6f79b205c3b41b",
    "signer": "0x075964F7BFA3756331d32632921930ca2a6F5a5F",
    "userId": "551890545"
  }
}